{"id":427923,"date":"2026-05-29T14:07:39","date_gmt":"2026-05-29T19:07:39","guid":{"rendered":"https:\/\/www.globaloring.com\/?page_id=427923"},"modified":"2026-05-29T14:08:08","modified_gmt":"2026-05-29T19:08:08","slug":"aerospace-seals-o-rings","status":"publish","type":"page","link":"https:\/\/www.globaloring.com\/aerospace-seals-o-rings\/","title":{"rendered":"Aerospace O-Rings &#038; Seals"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"427923\" class=\"elementor elementor-427923\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-69c826f e-flex e-con-boxed e-con e-parent\" data-id=\"69c826f\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f87629c elementor-widget elementor-widget-html\" data-id=\"f87629c\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\r\n.aero-content { font-family: \"Open Sans\", -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif; color: #1f2937; line-height: 1.6; max-width: 1180px; margin: 0 auto; padding: 8px 0 48px 0; }\r\n.aero-content h1 { color: #0093D0; font-family: \"Oswald\", sans-serif; font-size: 34px; margin: 0 0 10px 0; line-height: 1.15; }\r\n.aero-content h2 { color: #0093D0; font-family: \"Oswald\", sans-serif; font-size: 28px; margin: 36px 0 14px 0; padding-bottom: 6px; border-bottom: 2px solid #e6f4fa; }\r\n.aero-content h3 { color: #0093D0; font-family: \"Oswald\", sans-serif; font-size: 20px; margin: 22px 0 8px 0; }\r\n.aero-content h4 { color: #0093D0; font-size: 14px; text-transform: uppercase; letter-spacing: 0.6px; margin: 16px 0 6px 0; }\r\n.aero-content p, .aero-content ul, .aero-content ol { font-size: 15px; }\r\n.aero-content a { color: #0093D0; text-decoration: none; }\r\n.aero-content a:hover { color: #006ba3; text-decoration: underline; }\r\n\r\n\/* Hero *\/\r\n.aero-hero { background: linear-gradient(135deg, #0a2540 0%, #0093D0 100%); color:#ffffff; padding: 40px 24px; margin-bottom: 16px; border-radius: 6px; position: relative; overflow: hidden; }\r\n.aero-hero::before { content: \"\"; position: absolute; top: -40px; right: -40px; width: 260px; height: 260px; background: radial-gradient(circle, rgba(255,255,255,0.10) 0%, transparent 70%); pointer-events: none; }\r\n.aero-hero-inner { display: grid; grid-template-columns: 1.4fr 1fr; gap: 32px; align-items: center; position: relative; }\r\n@media (max-width: 900px){ .aero-hero-inner { grid-template-columns: 1fr; } }\r\n.aero-hero h1 { color: #ffffff !important; font-family: \"Oswald\", sans-serif; font-size: 36px; line-height: 1.15; margin: 0 0 12px 0; border:none; padding:0; }\r\n.aero-hero .lede { color: #e6f4fa; font-size: 17px; line-height: 1.55; margin: 0 0 18px 0; }\r\n.aero-hero .badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 22px 0; }\r\n.aero-hero .badges span { background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.35); color:#ffffff; font-size: 12px; font-weight: 600; letter-spacing: 0.5px; padding: 4px 10px; border-radius: 999px; }\r\n.aero-hero .hero-cta { display:flex; flex-wrap:wrap; gap: 10px; }\r\n.aero-hero .hero-cta a { display:inline-block; padding: 12px 18px; border-radius: 4px; font-weight: 700; font-size: 15px; text-decoration: none; }\r\n.aero-hero .cta-primary { background: #00B259; color:#ffffff !important; }\r\n.aero-hero .cta-primary:hover { background: #00a150; text-decoration:none; }\r\n.aero-hero .cta-secondary { background: #ffffff; color: #0093D0 !important; }\r\n.aero-hero .cta-secondary:hover { background: #f3f4f6; text-decoration:none; }\r\n.aero-hero-card { background: #ffffff; color: #1f2937; border-radius: 8px; padding: 18px 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.18); }\r\n.aero-hero-card h4 { margin: 0 0 8px 0; color: #0093D0; }\r\n.aero-hero-card ul { margin: 0; padding-left: 18px; }\r\n.aero-hero-card li { font-size: 14px; margin-bottom: 4px; }\r\n\r\n\/* Body grid *\/\r\n.aero-body { display: grid; grid-template-columns: 1fr; gap: 32px; padding: 0 16px; }\r\n@media (max-width: 900px){ .aero-body { grid-template-columns: 1fr; } }\r\n.aero-body > main { min-width: 0; }\r\n.aero-sidebar { background: #f8f9fa; border: 1px solid #e5e7eb; border-radius: 6px; padding: 18px; font-size: 14px; align-self: start; position: sticky; top: 16px; }\r\n.aero-sidebar h4 { margin: 0 0 10px 0; font-size: 12px; text-transform: uppercase; letter-spacing: 1.2px; color: #0093D0; }\r\n.aero-sidebar ul { list-style: none; margin: 0 0 16px 0; padding: 0; }\r\n.aero-sidebar li { padding: 6px 0; border-bottom: 1px solid #e5e7eb; }\r\n.aero-sidebar li:last-child { border-bottom: 0; }\r\n.aero-sidebar a { color: #4b5563; font-weight: 500; font-size: 13.5px; }\r\n.aero-sidebar .quick-cta { display:block; background: #00B259; color:#ffffff !important; text-align:center; font-weight: 700; padding: 10px; border-radius: 4px; font-size: 14px; margin-bottom: 8px; text-decoration: none; }\r\n.aero-sidebar .quick-cta.alt { background: #0093D0; }\r\n.aero-sidebar .quick-cta:hover { text-decoration:none; opacity: 0.94; }\r\n\r\n\/* Image placeholder + figure *\/\r\n.aero-figure { margin: 18px 0; }\r\n.aero-figure img { width: 100%; height: auto; border-radius: 8px; border: 1px solid #e5e7eb; display:block; }\r\n.aero-figure figcaption { font-size: 12.5px; color: #6b7280; margin-top: 6px; }\r\n.aero-img-ph { width: 100%; background: repeating-linear-gradient(45deg, #f3f4f6, #f3f4f6 12px, #e9eef3 12px, #e9eef3 24px); border: 2px dashed #9ca3af; border-radius: 8px; color: #4b5563; display: flex; align-items: center; justify-content: center; text-align: center; font-size: 13px; padding: 24px; line-height: 1.5; }\r\n.aero-img-ph strong { color: #006ba3; }\r\n\r\n\/* Decision aid table *\/\r\n.aero-decide { background: #e6f4fa; border: 1px solid #0093D0; border-radius: 8px; padding: 18px 22px; margin: 14px 0 24px 0; }\r\n.aero-decide h3 { margin: 0 0 6px 0; }\r\n.aero-decide p.intro { margin: 0 0 14px 0; font-size: 15px; color: #4b5563; }\r\n.aero-decide table { width: 100%; border-collapse: collapse; font-size: 14px; background: #ffffff; border-radius: 6px; overflow: hidden; }\r\n.aero-decide thead { background: #0093D0; color: #ffffff; }\r\n.aero-decide th, .aero-decide td { padding: 9px 12px; text-align: left; border-bottom: 1px solid #e5e7eb; vertical-align: top; }\r\n.aero-decide th { font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.6px; color: #ffffff; }\r\n.aero-decide td.match { font-weight: 700; color: #006ba3; }\r\n.aero-decide td a { color: #006ba3; font-weight: 600; }\r\n\r\n\/* Material \/ application block *\/\r\n.aero-block { background: #ffffff; border: 1px solid #e5e7eb; border-radius: 8px; padding: 22px 24px; margin: 14px 0 24px 0; }\r\n.aero-block .grid { display: grid; grid-template-columns: 1fr 240px; gap: 24px; align-items: start; }\r\n@media (max-width: 900px){ .aero-block .grid { grid-template-columns: 1fr; } }\r\n.aero-block h3 { margin: 0 0 8px 0; }\r\n.aero-block .spec { display:inline-block; background: #e6f9f0; color: #00a150; font-size: 11.5px; font-weight: 700; letter-spacing: 0.5px; padding: 2px 8px; border-radius: 999px; margin-left: 8px; vertical-align: middle; }\r\n.aero-block .what-list { margin: 10px 0 0 0; padding-left: 18px; }\r\n.aero-block .what-list li { font-size: 14.5px; margin-bottom: 4px; }\r\n.aero-block .material-note { background: #f8f9fa; border-left: 4px solid #0093D0; padding: 10px 14px; margin: 12px 0; font-size: 14px; }\r\n.aero-block .material-note strong { color: #0093D0; }\r\n.aero-block .warning-note { background: #fef3c7; border-left: 4px solid #f59e0b; padding: 10px 14px; margin: 12px 0; font-size: 14px; color: #92400e; }\r\n.aero-block .warning-note strong { color: #b45309; }\r\n.aero-block .side-cta { background: #f8f9fa; border: 1px solid #e5e7eb; border-radius: 6px; padding: 16px 18px; text-align: center; }\r\n.aero-block .side-cta h4 { margin: 0 0 10px 0; font-size: 12px; }\r\n.aero-block .side-cta a.btn { display:block; padding: 10px 14px; border-radius: 4px; font-weight: 700; font-size: 14px; background: #00B259; color:#ffffff !important; margin-bottom: 8px; text-decoration: none; }\r\n.aero-block .side-cta a.btn:hover { background: #00a150; text-decoration:none; }\r\n.aero-block .side-cta a.btn.alt { background: #0093D0; }\r\n.aero-block .side-cta a.btn.alt:hover { background: #006ba3; }\r\n.aero-block .side-cta p { font-size: 12.5px; color: #6b7280; margin: 8px 0 0 0; }\r\n\r\n\/* Material spec table *\/\r\n.aero-mat { background: #f8f9fa; border: 1px solid #e5e7eb; border-radius: 8px; padding: 22px 24px; margin: 14px 0 24px 0; }\r\n.aero-mat table { width: 100%; border-collapse: collapse; font-size: 13.5px; background: #ffffff; border-radius: 6px; overflow: hidden; }\r\n.aero-mat thead { background: #0a2540; color: #ffffff; }\r\n.aero-mat th, .aero-mat td { padding: 9px 12px; text-align: left; border-bottom: 1px solid #e5e7eb; vertical-align: top; }\r\n.aero-mat th { font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.5px; }\r\n.aero-mat td.mat { font-weight: 700; color: #006ba3; }\r\n.aero-mat td a { color: #006ba3; font-weight: 600; }\r\n\r\n\/* Domestic \/ supply chain callout *\/\r\n.aero-usa { background: #e6f9f0; border-left: 6px solid #00B259; border-radius: 6px; padding: 20px 24px; margin: 20px 0; }\r\n.aero-usa h3 { color: #00a150; margin: 0 0 8px 0; }\r\n.aero-usa p { font-size: 15px; margin: 0 0 10px 0; }\r\n.aero-usa a { color: #00854a; font-weight: 700; }\r\n\r\n\/* Trust signals *\/\r\n.aero-trust { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 16px 0 24px 0; }\r\n@media (max-width: 900px){ .aero-trust { grid-template-columns: 1fr 1fr; } }\r\n@media (max-width: 500px){ .aero-trust { grid-template-columns: 1fr; } }\r\n.aero-trust .t { background: #ffffff; border: 1px solid #e5e7eb; border-radius: 6px; padding: 16px 14px; text-align: center; }\r\n.aero-trust .t i { color: #00B259; font-size: 28px; margin-bottom: 8px; display: block; }\r\n.aero-trust .t h4 { margin: 4px 0 4px 0; font-size: 13px; }\r\n.aero-trust .t p { margin: 0; font-size: 13px; color: #4b5563; }\r\n\r\n\/* FAQ *\/\r\n.aero-faq details { background: #f8f9fa; border: 1px solid #e5e7eb; border-radius: 6px; padding: 12px 16px; margin-bottom: 10px; }\r\n.aero-faq details summary { cursor: pointer; font-size: 15px; padding: 4px 0; font-weight: 600; color: #1f2937; }\r\n.aero-faq details[open] summary { color: #0093D0; margin-bottom: 8px; }\r\n.aero-faq details p { margin: 4px 0 0 0; font-size: 14px; color: #4b5563; }\r\n\r\n\/* Closing CTA *\/\r\n.aero-close { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 28px 0; }\r\n@media (max-width: 700px){ .aero-close { grid-template-columns: 1fr; } }\r\n.aero-close .lane { border: 1px solid #e5e7eb; border-radius: 8px; padding: 22px 24px; }\r\n.aero-close .lane.quote { background: #e6f9f0; border-color: #00B259; }\r\n.aero-close .lane.help  { background: #e6f4fa; border-color: #0093D0; }\r\n.aero-close h3 { margin: 0 0 6px 0; }\r\n.aero-close .lane.quote h3 { color: #00a150; }\r\n.aero-close .lane.help  h3 { color: #006ba3; }\r\n.aero-close p { font-size: 14.5px; margin: 0 0 12px 0; color: #4b5563; }\r\n.aero-close a.btn-cta { display:inline-block; padding: 11px 18px; border-radius: 4px; font-weight: 700; font-size: 15px; color:#ffffff !important; text-decoration: none; }\r\n.aero-close .lane.quote a.btn-cta { background: #00B259; }\r\n.aero-close .lane.quote a.btn-cta:hover { background: #00a150; text-decoration:none; }\r\n.aero-close .lane.help  a.btn-cta { background: #0093D0; }\r\n.aero-close .lane.help  a.btn-cta:hover { background: #006ba3; text-decoration:none; }\r\n\r\n\/* Related links footer *\/\r\n.aero-related { background: #f8f9fa; border: 1px solid #e5e7eb; border-radius: 6px; padding: 18px 22px; margin: 14px 0 24px 0; }\r\n.aero-related h4 { margin: 0 0 10px 0; font-size: 13px; }\r\n.aero-related .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }\r\n@media (max-width: 700px){ .aero-related .grid { grid-template-columns: 1fr 1fr; } }\r\n@media (max-width: 480px){ .aero-related .grid { grid-template-columns: 1fr; } }\r\n.aero-related .grid a { display: block; padding: 8px 0; font-size: 13.5px; font-weight: 600; }\r\n\r\n.aero-footnote { font-size: 11.5px; color: #6b7280; margin: 24px 0 0 0; padding-top: 12px; border-top: 1px solid #e5e7eb; }\r\n<\/style>\r\n\r\n<div class=\"aero-content\">\r\n\r\n  <!-- HERO -->\r\n  <section class=\"aero-hero\">\r\n    <div class=\"aero-hero-inner\">\r\n      <div>\r\n        <h1>Aerospace O-Rings &amp; Seals<\/h1>\r\n        <p class=\"lede\">Flight-critical sealing for fuel, hydraulic, pneumatic, and high-temperature engine systems. We supply aerospace-grade elastomer o-rings and seals &mdash; fluorosilicone for jet fuel, EPDM for phosphate-ester (Skydrol) hydraulics, FKM and FFKM for high-temperature service &mdash; in AS568 and NAS1611 sizes, with domestic manufacturing available for defense and supply-chain-sensitive programs.<\/p>\r\n        <div class=\"badges\">\r\n          <span>AS9100 &middot; ITAR Registered<\/span>\r\n          <span>AS568 &amp; NAS1611 Sizes<\/span>\r\n          <span>Fuel &amp; Skydrol Resistant<\/span>\r\n          <span>Domestic Manufacturing Available<\/span>\r\n        <\/div>\r\n        <div class=\"hero-cta\">\r\n          <a class=\"cta-primary\" href=\"https:\/\/www.globaloring.com\/rfq\/\">Request a Quote &rarr;<\/a>\r\n          <a class=\"cta-secondary\" href=\"#select\">Select by application &darr;<\/a>\r\n        <\/div>\r\n      <\/div>\r\n      <div class=\"aero-hero-card\">\r\n        <h4>Aerospace systems we seal<\/h4>\r\n        <ul>\r\n          <li>Hydraulic actuators, flight controls, landing gear<\/li>\r\n          <li>Fuel systems &mdash; tanks, lines, pumps, manifolds<\/li>\r\n          <li>Environmental control &amp; pneumatic systems<\/li>\r\n          <li>Engine &amp; turbine hot-section seals<\/li>\r\n          <li>Avionics enclosures &amp; EMI\/RFI shielding<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <!-- BODY GRID -->\r\n  <div class=\"aero-body\">\r\n    <main>\r\n\r\n      <p>Aerospace sealing is a materials problem before it is a sizing problem. The same AS568 dash number can succeed or fail depending entirely on the compound: jet fuel, phosphate-ester hydraulic fluid, ozone, and a service window that can swing from &minus;65&deg;F at altitude to well over +400&deg;F near an engine all demand different elastomers. This page maps aerospace systems and fluids to the right seal material, lists the standards we build to, and explains the domestic-sourcing options that matter for defense and supply-chain-sensitive programs. If you already have a print or spec, <a href=\"https:\/\/www.globaloring.com\/rfq\/\">send it to us for a quote<\/a>.<\/p>\r\n\r\n      <!-- IMAGE: hero\/intro figure (verify Media Library URL after upload; may include \/2026\/05\/) -->\r\n      <figure class=\"aero-figure\">\r\n        <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.globaloring.com\/wp-content\/uploads\/2026\/05\/aerospace-o-rings-seals.jpg\" alt=\"Aerospace o-rings and seals for aircraft fuel, hydraulic, and engine systems\" width=\"1100\" height=\"493\" loading=\"lazy\">\r\n        <figcaption>Aerospace-grade o-rings and seals in AS568 and NAS1611 sizes &mdash; FVMQ for fuel, EPDM for Skydrol, FKM and FFKM for high heat.<\/figcaption>\r\n      <\/figure>\r\n\r\n      <!-- ============ SECTION 1: SELECT BY APPLICATION ============ -->\r\n      <h2 id=\"select\">Select an aerospace seal by application<\/h2>\r\n      <p>Start with the system and the fluid or environment the seal contacts, then choose the compound. The most common aerospace sealing failures come from putting a fuel-rated compound in a Skydrol line, or a standard nitrile in a high-temperature engine location.<\/p>\r\n      <div class=\"aero-decide\">\r\n        <h3 style=\"margin-bottom:6px;\">Aerospace material selector<\/h3>\r\n        <p class=\"intro\">Three questions: <em>what system<\/em>, <em>what fluid or environment<\/em> contacts the seal, and <em>what compound<\/em> handles it across the temperature range.<\/p>\r\n        <table>\r\n          <thead>\r\n            <tr>\r\n              <th>System \/ application<\/th>\r\n              <th>Fluid or environment<\/th>\r\n              <th>Recommended compound<\/th>\r\n              <th>Material<\/th>\r\n            <\/tr>\r\n          <\/thead>\r\n          <tbody>\r\n            <tr>\r\n              <td>Fuel systems (Jet A, JP-4, JP-5, JP-8)<\/td>\r\n              <td>Hydrocarbon jet fuel + wide temperature range<\/td>\r\n              <td class=\"match\">Fluorosilicone (FVMQ)<\/td>\r\n              <td><a href=\"https:\/\/www.globaloring.com\/fluorosilicone-o-rings\/\">FVMQ &rarr;<\/a><\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Hydraulic systems &mdash; commercial aircraft<\/td>\r\n              <td>Phosphate-ester fluid (Skydrol, Hyjet)<\/td>\r\n              <td class=\"match\">EPDM<\/td>\r\n              <td><a href=\"https:\/\/www.globaloring.com\/epdm-o-rings\/\">EPDM &rarr;<\/a><\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Hydraulic systems &mdash; petroleum-based<\/td>\r\n              <td>MIL-PRF-5606 \/ -83282 \/ -87257 fluids<\/td>\r\n              <td class=\"match\">Nitrile (NBR) or FKM<\/td>\r\n              <td><a href=\"https:\/\/www.globaloring.com\/buna-nitrile-o-rings\/\">NBR &rarr;<\/a><\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Engine &amp; turbine hot section<\/td>\r\n              <td>High temperature, fuel, synthetic lubricants<\/td>\r\n              <td class=\"match\">FKM or FFKM<\/td>\r\n              <td><a href=\"https:\/\/www.globaloring.com\/viton-fkm-o-rings\/\">FKM &rarr;<\/a><\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Extreme temperature \/ aggressive media<\/td>\r\n              <td>Continuous high heat + chemical attack<\/td>\r\n              <td class=\"match\">FFKM (perfluoroelastomer)<\/td>\r\n              <td><a href=\"https:\/\/www.globaloring.com\/perfluoroelastomer-ffkm-o-rings\/\">FFKM &rarr;<\/a><\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Environmental control \/ pneumatic \/ static<\/td>\r\n              <td>Wide temperature, air, ozone, weathering<\/td>\r\n              <td class=\"match\">Silicone (VMQ)<\/td>\r\n              <td><a href=\"https:\/\/www.globaloring.com\/silicone-o-rings\/\">VMQ &rarr;<\/a><\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>High-temp static \/ backup rings \/ anti-extrusion<\/td>\r\n              <td>Chemically inert, low friction, high temp<\/td>\r\n              <td class=\"match\">PTFE<\/td>\r\n              <td><a href=\"https:\/\/www.globaloring.com\/ptfe-teflon-o-rings\/\">PTFE &rarr;<\/a><\/td>\r\n            <\/tr>\r\n          <\/tbody>\r\n        <\/table>\r\n      <\/div>\r\n      <p style=\"font-size:13.5px;color:#6b7280;\"><strong>Critical rule:<\/strong> phosphate-ester hydraulic fluids (Skydrol, Hyjet) attack nitrile and fluorocarbon. Commercial aircraft hydraulic seals running these fluids must be EPDM. Confirm your hydraulic fluid spec before selecting a compound.<\/p>\r\n\r\n      <!-- ============ SECTION 2: MATERIALS DEEP DIVE ============ -->\r\n      <h2 id=\"materials\">Aerospace seal materials<\/h2>\r\n\r\n      <!-- FVMQ -->\r\n      <div class=\"aero-block\">\r\n        <div class=\"grid\">\r\n          <div>\r\n            <h3 style=\"margin-top:0;\">Fluorosilicone (FVMQ) <span class=\"spec\">Fuel + wide temp<\/span><\/h3>\r\n            <p>Fluorosilicone is the aerospace fuel-system workhorse. It combines the fuel and oil resistance of fluorocarbon with the extreme low-temperature flexibility of silicone &mdash; a combination almost no other elastomer offers. That makes it the default choice wherever a seal sees jet fuel <em>and<\/em> high-altitude cold.<\/p>\r\n            <ul class=\"what-list\">\r\n              <li>Typical service range: roughly &minus;75&deg;F to +350&deg;F<\/li>\r\n              <li>Resists Jet A, JP-4, JP-5, JP-8, di-ester lubricants<\/li>\r\n              <li>Common spec callouts: AMS 7379, MIL-DTL-25988<\/li>\r\n              <li>Applications: fuel tank seals, fuel line fittings, pump seals<\/li>\r\n            <\/ul>\r\n            <div class=\"material-note\">\r\n              <strong>Why not plain silicone or plain FKM?<\/strong> Silicone has the cold flexibility but poor fuel resistance; FKM has the fuel resistance but stiffens badly in the cold. FVMQ is the bridge &mdash; it is specified precisely for the fuel-plus-cold case. <a href=\"https:\/\/www.globaloring.com\/fluorosilicone-o-rings\/\">More on FVMQ &rarr;<\/a>\r\n            <\/div>\r\n          <\/div>\r\n          <div class=\"side-cta\">\r\n            <h4>Spec an FVMQ seal<\/h4>\r\n            <a class=\"btn\" href=\"https:\/\/www.globaloring.com\/rfq\/\">Request a Quote &rarr;<\/a>\r\n            <a class=\"btn alt\" href=\"https:\/\/www.globaloring.com\/fluorosilicone-o-rings\/\">FVMQ details<\/a>\r\n            <p>AS568 &amp; custom sizes.<\/p>\r\n          <\/div>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <!-- EPDM \/ Skydrol -->\r\n      <div class=\"aero-block\">\r\n        <div class=\"grid\">\r\n          <div>\r\n            <h3 style=\"margin-top:0;\">EPDM &mdash; phosphate-ester hydraulics <span class=\"spec\">Skydrol \/ Hyjet<\/span><\/h3>\r\n            <p>Commercial aircraft hydraulic systems run phosphate-ester fluids (commonly known by the trade names Skydrol and Hyjet) for fire resistance. These fluids chemically attack nitrile and fluorocarbon. EPDM is the required elastomer family &mdash; it is essentially inert in phosphate esters and holds up across the hydraulic temperature range.<\/p>\r\n            <ul class=\"what-list\">\r\n              <li>Typical service range: roughly &minus;65&deg;F to +300&deg;F<\/li>\r\n              <li>Excellent in phosphate-ester hydraulic fluid, water, steam, ozone<\/li>\r\n              <li>Applications: flight-control actuators, landing gear, hydraulic manifolds<\/li>\r\n            <\/ul>\r\n            <div class=\"warning-note\">\r\n              <strong>Do not substitute:<\/strong> nitrile (NBR) or fluorocarbon (FKM) o-rings will swell, soften, and fail in Skydrol-class fluids. EPDM and phosphate ester are a matched pair &mdash; and EPDM must <em>not<\/em> be used in petroleum-based hydraulic systems, where it fails. Match the elastomer to the fluid family.\r\n            <\/div>\r\n            <p style=\"margin:0;\"><a href=\"https:\/\/www.globaloring.com\/epdm-o-rings\/\">More on EPDM &rarr;<\/a><\/p>\r\n          <\/div>\r\n          <div class=\"side-cta\">\r\n            <h4>Skydrol-compatible seals<\/h4>\r\n            <a class=\"btn\" href=\"https:\/\/www.globaloring.com\/rfq\/\">Request a Quote &rarr;<\/a>\r\n            <a class=\"btn alt\" href=\"https:\/\/www.globaloring.com\/epdm-o-rings\/\">EPDM details<\/a>\r\n            <p>Phosphate-ester rated.<\/p>\r\n          <\/div>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <!-- FKM \/ FFKM -->\r\n      <div class=\"aero-block\">\r\n        <div class=\"grid\">\r\n          <div>\r\n            <h3 style=\"margin-top:0;\">FKM &amp; FFKM &mdash; high-temperature service <span class=\"spec\">Engine \/ turbine<\/span><\/h3>\r\n            <p>For high-temperature locations &mdash; engine accessories, turbine areas, hot fuel, and synthetic lubricant contact &mdash; fluorocarbon (FKM) and perfluoroelastomer (FFKM) are the aerospace high-heat materials. FKM covers the broad high-temp range economically; FFKM is reserved for the most extreme combination of heat and chemical attack, where its near-universal chemical resistance and continuous service above +500&deg;F earns the premium.<\/p>\r\n            <ul class=\"what-list\">\r\n              <li>FKM service range: roughly &minus;15&deg;F to +400&deg;F (low-temp grades extend colder)<\/li>\r\n              <li>FFKM service range: up to roughly +600&deg;F continuous (grade-dependent)<\/li>\r\n              <li>Compatible with synthetic gas-turbine engine oils &mdash; MIL-PRF-23699, MIL-PRF-7808<\/li>\r\n              <li>High-modulus 90 durometer FFKM grades resist extrusion and rapid gas decompression (RGD)<\/li>\r\n              <li>Peroxide-cured FFKM grades (e.g. AMS 7257) for aerospace and aggressive chemical service<\/li>\r\n              <li>FKM specs: AMS 7276 \/ AMS 7280; AMS-P-83461 \/ MIL-P-83461 packings<\/li>\r\n              <li>Applications: engine seals, hot-air \/ bleed systems, fuel at temperature, accessory gearbox<\/li>\r\n            <\/ul>\r\n            <div class=\"material-note\">\r\n              <strong>FKM vs FFKM:<\/strong> choose FKM for cost-effective high-temperature fuel and oil sealing; step up to <a href=\"https:\/\/www.globaloring.com\/perfluoroelastomer-ffkm-o-rings\/\">FFKM<\/a> only when temperature, chemical aggressiveness, or both exceed FKM&rsquo;s limit. For high-pressure or rapid-cycling gas service, specify an RGD-resistant high-modulus FFKM grade. <a href=\"https:\/\/www.globaloring.com\/viton-fkm-o-rings\/\">More on FKM &rarr;<\/a>\r\n            <\/div>\r\n          <\/div>\r\n          <div class=\"side-cta\">\r\n            <h4>High-temp aerospace seals<\/h4>\r\n            <a class=\"btn\" href=\"https:\/\/www.globaloring.com\/rfq\/\">Request a Quote &rarr;<\/a>\r\n            <a class=\"btn alt\" href=\"https:\/\/www.globaloring.com\/perfluoroelastomer-ffkm-o-rings\/\">FFKM details<\/a>\r\n            <p>FKM &amp; FFKM to spec.<\/p>\r\n          <\/div>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <!-- Material reference table -->\r\n      <h2 id=\"reference\">Aerospace material reference<\/h2>\r\n      <div class=\"aero-mat\">\r\n        <p style=\"margin-top:0;font-size:14px;\">Quick reference for aerospace elastomer selection. Service ranges are typical and compound-dependent &mdash; confirm against your program specification.<\/p>\r\n        <table>\r\n          <thead>\r\n            <tr>\r\n              <th>Material<\/th>\r\n              <th>Typical temp range<\/th>\r\n              <th>Best for<\/th>\r\n              <th>Avoid in<\/th>\r\n            <\/tr>\r\n          <\/thead>\r\n          <tbody>\r\n            <tr>\r\n              <td class=\"mat\"><a href=\"https:\/\/www.globaloring.com\/fluorosilicone-o-rings\/\">FVMQ (fluorosilicone)<\/a><\/td>\r\n              <td>&minus;75&deg;F to +350&deg;F<\/td>\r\n              <td>Jet fuel + cold; fuel system seals<\/td>\r\n              <td>High-pressure dynamic duty<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td class=\"mat\"><a href=\"https:\/\/www.globaloring.com\/epdm-o-rings\/\">EPDM<\/a><\/td>\r\n              <td>&minus;65&deg;F to +300&deg;F<\/td>\r\n              <td>Phosphate-ester (Skydrol) hydraulics<\/td>\r\n              <td>Petroleum oils &amp; fuels<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td class=\"mat\"><a href=\"https:\/\/www.globaloring.com\/viton-fkm-o-rings\/\">FKM (fluorocarbon)<\/a><\/td>\r\n              <td>&minus;15&deg;F to +400&deg;F<\/td>\r\n              <td>High-temp fuel &amp; oil; engine areas<\/td>\r\n              <td>Skydrol; extreme cold (std grades)<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td class=\"mat\"><a href=\"https:\/\/www.globaloring.com\/perfluoroelastomer-ffkm-o-rings\/\">FFKM<\/a><\/td>\r\n              <td>up to +600&deg;F<\/td>\r\n              <td>Extreme heat + chemical attack<\/td>\r\n              <td>Cost-sensitive standard duty<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td class=\"mat\"><a href=\"https:\/\/www.globaloring.com\/buna-nitrile-o-rings\/\">NBR (nitrile)<\/a><\/td>\r\n              <td>&minus;40&deg;F to +250&deg;F<\/td>\r\n              <td>Petroleum hydraulic fluid &amp; fuel<\/td>\r\n              <td>Skydrol; ozone; high heat<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td class=\"mat\"><a href=\"https:\/\/www.globaloring.com\/silicone-o-rings\/\">VMQ (silicone)<\/a><\/td>\r\n              <td>&minus;75&deg;F to +400&deg;F<\/td>\r\n              <td>Static seals, ECS, ozone\/weathering<\/td>\r\n              <td>Fuel; dynamic \/ abrasion duty<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td class=\"mat\"><a href=\"https:\/\/www.globaloring.com\/ptfe-teflon-o-rings\/\">PTFE<\/a><\/td>\r\n              <td>&minus;100&deg;F to +450&deg;F<\/td>\r\n              <td>Backup rings, inert static seals<\/td>\r\n              <td>Applications needing elastic recovery<\/td>\r\n            <\/tr>\r\n          <\/tbody>\r\n        <\/table>\r\n      <\/div>\r\n\r\n      <!-- ============ SECTION 2b: ENGINEERED PERFORMANCE ============ -->\r\n      <h2 id=\"performance\">Engineered performance attributes<\/h2>\r\n      <p>Aerospace and space programs often specify sealing performance beyond a basic fluid-and-temperature rating. These are the engineered attributes to call out on an RFQ when the application demands them &mdash; specify the requirement and we&rsquo;ll match the compound and grade.<\/p>\r\n      <div class=\"aero-block\">\r\n        <div class=\"grid\">\r\n          <div>\r\n            <h4>Rapid gas decompression (RGD \/ explosive decompression)<\/h4>\r\n            <p>In high-pressure gas systems, dissolved gas can rupture a seal from the inside when pressure drops quickly. High-modulus 90-durometer FFKM and specially compounded FKM grades are formulated to resist rapid gas decompression (RGD), also called explosive decompression (ED). Specify RGD resistance for high-pressure pneumatic, bleed-air, and gas-charged applications. <a href=\"https:\/\/www.globaloring.com\/rapid-gas-decompression\/\">More on rapid gas decompression &rarr;<\/a><\/p>\r\n\r\n            <h4>Low outgassing &mdash; vacuum &amp; space<\/h4>\r\n            <p>For space, satellite, and vacuum service, materials are screened for outgassing per <strong>NASA ASTM E595<\/strong> (TML &le; 1.0%, CVCM &le; 0.10%). Low-outgassing, cleanroom-handled FFKM and silicone grades maintain vacuum leak-tightness and avoid contaminating optics and sensitive surfaces.<\/p>\r\n\r\n            <h4>Cryogenic &amp; LOX \/ oxygen service<\/h4>\r\n            <p>Launch-vehicle and propulsion systems demand cryogenic sealing for liquid oxygen (LOX), liquid nitrogen, and liquid hydrogen, plus oxygen compatibility for gaseous O&#8322; systems. Material selection and cleaning (oxygen-clean processing) are both critical here &mdash; call out the media and cleanliness level on the RFQ.<\/p>\r\n\r\n            <h4>Plasma &amp; thermal cycling resistance<\/h4>\r\n            <p>Specialty FFKM grades resist plasma and reactive-gas attack (shared with semiconductor process sealing) and survive repeated thermal cycling with low compression set, so the seal recovers and keeps sealing across thousands of cycles.<\/p>\r\n          <\/div>\r\n          <div class=\"side-cta\">\r\n            <h4>Specify a performance grade<\/h4>\r\n            <a class=\"btn\" href=\"https:\/\/www.globaloring.com\/rfq\/\">Request a Quote &rarr;<\/a>\r\n            <a class=\"btn alt\" href=\"https:\/\/www.globaloring.com\/perfluoroelastomer-ffkm-o-rings\/\">FFKM grades<\/a>\r\n            <p>RGD, low-outgassing, cryogenic, and plasma-resistant compounds to spec.<\/p>\r\n          <\/div>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <!-- ============ SECTION 3: STANDARDS ============ -->\r\n      <h2 id=\"standards\">Standards &amp; sizes we build to<\/h2>\r\n      <p>Aerospace seals are specified against a layered set of size, material, and quality standards. We supply to standard size systems and work from your AMS, MIL, MS, or NAS callouts.<\/p>\r\n      <div class=\"aero-block\">\r\n        <h4>Size &amp; packing standards<\/h4>\r\n        <ul class=\"what-list\">\r\n          <li><strong>AS568<\/strong> &mdash; the SAE aerospace standard for o-ring inch sizes (the industry baseline). <a href=\"https:\/\/www.globaloring.com\/as568-size-chart\/\">See the AS568 chart &rarr;<\/a><\/li>\r\n          <li><strong>NAS1611<\/strong> &mdash; National Aerospace Standard o-ring sizes for hydraulic and pneumatic packings<\/li>\r\n          <li><strong>AS3578 \/ AS3209<\/strong> &mdash; aerospace o-ring sizing and packing standards<\/li>\r\n          <li><strong>MS \/ AN part numbers<\/strong> &mdash; MS28775, MS29561, MS9388, MS28778 and related military-standard dash systems<\/li>\r\n        <\/ul>\r\n        <h4>Material specifications<\/h4>\r\n        <ul class=\"what-list\">\r\n          <li><strong>FKM:<\/strong> AMS 7276, AMS 7280, AMS-P-83461 \/ MIL-P-83461 (improved-performance packings)<\/li>\r\n          <li><strong>FVMQ (fluorosilicone):<\/strong> AMS 7379, MIL-DTL-25988<\/li>\r\n          <li><strong>NBR (nitrile):<\/strong> AMS 7270 \/ MIL-P-25732 (hydraulic packings)<\/li>\r\n          <li><strong>FFKM:<\/strong> AMS 7257 (peroxide-cured perfluoroelastomer) and program-specific grades<\/li>\r\n          <li><strong>Silicone:<\/strong> AMS 7271 (VMQ)<\/li>\r\n        <\/ul>\r\n        <h4>Aerospace fluids we match compounds to<\/h4>\r\n        <ul class=\"what-list\">\r\n          <li><strong>Fuels:<\/strong> Jet A, JP-4, JP-5, JP-8<\/li>\r\n          <li><strong>Hydraulic:<\/strong> phosphate ester (Skydrol, Hyjet); petroleum MIL-PRF-5606 \/ -83282 \/ -87257<\/li>\r\n          <li><strong>Turbine engine oils:<\/strong> MIL-PRF-23699, MIL-PRF-7808, MIL-PRF-85734<\/li>\r\n        <\/ul>\r\n        <p style=\"margin-bottom:0;font-size:13.5px;color:#6b7280;\">Working to a specific AMS\/MIL\/NAS callout or a controlled drawing? <a href=\"https:\/\/www.globaloring.com\/rfq\/\">Send the spec with your RFQ<\/a> and we&rsquo;ll quote to it.<\/p>\r\n      <\/div>\r\n\r\n      <!-- =====================================================================\r\n           QUALITY & COMPLIANCE\r\n           Credentials confirmed by David 2026-05-29: ISO 9001, AS9100, ITAR\r\n           registered, NADCAP + DFARS-capable, Buy American capable, C of C \/\r\n           lot traceability. Ensure \/quality\/ page carries the supporting cert\r\n           numbers \/ registrar as backing evidence.\r\n      ====================================================================== -->\r\n      <h3 id=\"quality\">Quality &amp; compliance<\/h3>\r\n      <div class=\"aero-block\">\r\n        <p>Aerospace and defense procurement requires documented quality and supply-chain compliance. Our credentials and capabilities include:<\/p>\r\n        <ul class=\"what-list\">\r\n          <li><strong>AS9100<\/strong> aerospace quality management system, built on <strong>ISO 9001<\/strong> &mdash; see our <a href=\"https:\/\/www.globaloring.com\/quality\/\">quality &amp; certifications<\/a><\/li>\r\n          <li><strong>ITAR registered<\/strong> for programs involving controlled defense articles and technical data<\/li>\r\n          <li><strong>NADCAP<\/strong> special-process accreditation<\/li>\r\n          <li><strong>DFARS<\/strong> and <strong>Buy American<\/strong> domestic-content sourcing &mdash; domestic manufacturing available on request<\/li>\r\n          <li>Material certifications, certificates of conformance (C of C), and full lot traceability on request<\/li>\r\n        <\/ul>\r\n        <p style=\"margin-bottom:0;font-size:13.5px;color:#6b7280;\">Need specific quality documentation with your order? Note it on your <a href=\"https:\/\/www.globaloring.com\/rfq\/\">RFQ<\/a>.<\/p>\r\n      <\/div>\r\n\r\n      <!-- ============ SECTION 4: DOMESTIC MANUFACTURING ============ -->\r\n      <h2 id=\"domestic\">Domestic manufacturing &amp; supply-chain sourcing<\/h2>\r\n      <div class=\"aero-usa\">\r\n        <h3>USA-based, with domestic manufacturing available<\/h3>\r\n        <p>Aerospace and defense programs increasingly carry domestic-content and supply-chain-traceability requirements &mdash; Buy American, DFARS, and program-specific sourcing rules. We are a US-based supplier and offer <strong>domestic manufacturing on request<\/strong> for o-rings and seals where the program requires it, alongside our standard inventory for prototyping and lower-criticality applications.<\/p>\r\n        <p>For custom geometries, non-standard sizes, and program-specific compounds, our <a href=\"https:\/\/www.globaloring.com\/custom-molded-o-rings\/\">custom molded o-ring<\/a> program produces to your drawing. Defense and military programs &mdash; including MIL-spec o-ring requirements &mdash; are covered on our <a href=\"https:\/\/www.globaloring.com\/mil-spec-o-rings\/\">defense &amp; military seals<\/a> page.<\/p>\r\n        <p style=\"margin:0;\"><a href=\"https:\/\/www.globaloring.com\/american-made-oil-seals-o-rings\/\">Explore American-made oil seals &amp; o-rings &rarr;<\/a><\/p>\r\n      <\/div>\r\n\r\n      <!-- IMAGE: domestic manufacturing figure -->\r\n      <figure class=\"aero-figure\">\r\n        <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.globaloring.com\/wp-content\/uploads\/2026\/05\/aerospace-domestic-manufacturing.jpg\" alt=\"Domestic manufacturing of aerospace o-rings and seals in the USA\" width=\"1100\" height=\"655\" loading=\"lazy\">\r\n        <figcaption>Domestic manufacturing available for aerospace and defense programs.<\/figcaption>\r\n      <\/figure>\r\n\r\n      <!-- ============ SECTION 5: APPLICATIONS ============ -->\r\n      <h2 id=\"applications\">Aerospace applications we support<\/h2>\r\n      <div class=\"aero-block\">\r\n        <ul class=\"what-list\">\r\n          <li><strong>Hydraulic systems<\/strong> &mdash; flight-control actuators, landing gear, brakes, and manifolds (EPDM for phosphate ester; NBR\/FKM for petroleum fluids)<\/li>\r\n          <li><strong>Fuel systems<\/strong> &mdash; tanks, lines, pumps, valves, and manifolds (FVMQ for fuel-plus-cold; FKM for hot fuel)<\/li>\r\n          <li><strong>Environmental control &amp; pneumatic systems<\/strong> &mdash; bleed air, cabin pressurization, ducting (VMQ, FKM)<\/li>\r\n          <li><strong>Engine &amp; turbine<\/strong> &mdash; accessory seals, hot-section static seals (FKM, FFKM)<\/li>\r\n          <li><strong>Avionics &amp; electronics enclosures<\/strong> &mdash; environmental sealing and EMI\/RFI shielding gaskets<\/li>\r\n          <li><strong>Space, satellite &amp; launch vehicles<\/strong> &mdash; low-outgassing, cryogenic, and LOX-compatible seals for propulsion and vacuum service<\/li>\r\n          <li><strong>UAV \/ unmanned systems<\/strong> &mdash; compact fuel, hydraulic, and pneumatic sealing<\/li>\r\n          <li><strong>Ground support &amp; MRO<\/strong> &mdash; replacement and overhaul seals across legacy and current platforms<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n\r\n      <!-- ============ SECTION 6: TRUST ============ -->\r\n      <h2 id=\"why\">Why source aerospace seals from us<\/h2>\r\n      <div class=\"aero-trust\">\r\n        <div class=\"t\">\r\n          <i class=\"fas fa-certificate\" aria-hidden=\"true\"><\/i>\r\n          <h4>AS9100 &amp; ITAR<\/h4>\r\n          <p>AS9100 \/ ISO 9001 quality system, ITAR registered, NADCAP accredited.<\/p>\r\n        <\/div>\r\n        <div class=\"t\">\r\n          <i class=\"fas fa-flag-usa\" aria-hidden=\"true\"><\/i>\r\n          <h4>USA-based sourcing<\/h4>\r\n          <p>Domestic manufacturing available; DFARS and Buy American capable.<\/p>\r\n        <\/div>\r\n        <div class=\"t\">\r\n          <i class=\"fas fa-cubes\" aria-hidden=\"true\"><\/i>\r\n          <h4>Material breadth<\/h4>\r\n          <p>FVMQ, EPDM, FKM, FFKM, NBR, VMQ, and PTFE from one source.<\/p>\r\n        <\/div>\r\n        <div class=\"t\">\r\n          <i class=\"fas fa-cogs\" aria-hidden=\"true\"><\/i>\r\n          <h4>Custom &amp; standard<\/h4>\r\n          <p>AS568\/NAS1611 stock plus custom molded geometries to drawing.<\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <!-- ============ SECTION 7: FAQ (GEO) ============ -->\r\n      <h2 id=\"faq\">Aerospace sealing FAQ<\/h2>\r\n      <div class=\"aero-faq\">\r\n        <details>\r\n          <summary>What o-ring material is used in aircraft fuel systems?<\/summary>\r\n          <p>Fluorosilicone (FVMQ) is the standard o-ring material for aircraft fuel systems. It resists hydrocarbon jet fuels (Jet A, JP-4, JP-5, JP-8) while staying flexible at the very low temperatures encountered at altitude &mdash; roughly &minus;75&deg;F to +350&deg;F. Fluorocarbon (FKM) is also used where the fuel runs hot but extreme cold is not a factor. Standard nitrile is generally not used in modern aircraft fuel systems because it cannot match the temperature range.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>What seal material is compatible with Skydrol hydraulic fluid?<\/summary>\r\n          <p>EPDM is the seal material compatible with Skydrol and other phosphate-ester aviation hydraulic fluids (such as Hyjet). Phosphate esters chemically attack nitrile (NBR) and fluorocarbon (FKM), causing them to swell and fail, so commercial aircraft hydraulic systems running these fluids use EPDM o-rings and seals. Note that EPDM must not be used in petroleum-based hydraulic systems, where the opposite is true and nitrile or fluorocarbon is required.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>What is fluorosilicone (FVMQ) used for in aerospace?<\/summary>\r\n          <p>Fluorosilicone (FVMQ) is used in aerospace wherever a seal must resist fuel and oil while remaining flexible in extreme cold. It combines the fuel resistance of fluorocarbon with the low-temperature flexibility of silicone, which makes it the default material for aircraft fuel tank seals, fuel line fittings, and fuel pump seals. Typical specifications include AMS 7379 and MIL-DTL-25988.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>What temperature range do aerospace o-rings need to handle?<\/summary>\r\n          <p>Aerospace o-rings can see anywhere from about &minus;65&deg;F to &minus;75&deg;F at altitude up to +400&deg;F or higher near engines and turbines, so the required range depends entirely on the location. Fluorosilicone covers the low end with fuel resistance; FKM covers high-temperature fuel and oil; FFKM extends continuous service to roughly +600&deg;F; silicone offers the widest range for static, non-fuel applications. Always select the compound for the specific temperature window of the application.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>Do you supply aerospace and mil-spec o-rings to AMS, MIL, and NAS standards?<\/summary>\r\n          <p>Yes. We supply o-rings and seals to AS568 and NAS1611 size standards and work from AMS material specifications (such as AMS 7276 for FKM and AMS 7379 for fluorosilicone), MIL-DTL\/MIL-PRF specifications, and MS part-number callouts. Send your specification or controlled drawing with a quote request and we will quote to it. Defense and military requirements are covered in more detail on our mil-spec o-rings page.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>Can you provide domestically manufactured aerospace seals?<\/summary>\r\n          <p>Yes. We are a US-based supplier and offer domestic manufacturing on request for o-rings and seals, which supports Buy American, DFARS, and program-specific domestic-content and supply-chain-traceability requirements common in aerospace and defense work. Standard inventory is available for prototyping and lower-criticality applications, and custom molded production is available to your drawing.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>What material should I use for high-temperature engine seals?<\/summary>\r\n          <p>Use fluorocarbon (FKM) for most high-temperature aerospace engine and accessory seals &mdash; it handles roughly &minus;15&deg;F to +400&deg;F with strong fuel and oil resistance and is compatible with synthetic turbine engine oils (MIL-PRF-23699, MIL-PRF-7808). Step up to perfluoroelastomer (FFKM) when the application combines extreme heat (up to about +600&deg;F continuous) with aggressive chemical exposure. FFKM costs more but provides near-universal chemical resistance where FKM reaches its limit.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>Are FFKM o-rings rapid gas decompression (RGD) resistant?<\/summary>\r\n          <p>High-modulus FFKM grades, typically at 90 Shore A durometer, are formulated to resist rapid gas decompression (RGD), also called explosive decompression (ED). RGD occurs when gas dissolved into the elastomer under pressure expands and ruptures the seal as system pressure drops quickly. For high-pressure pneumatic, bleed-air, and gas-charged aerospace applications, specify an RGD-resistant high-modulus FFKM (or a specially compounded FKM) and we will match the grade to the pressure and cycle requirements.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>Do you supply low-outgassing seals for space and vacuum applications?<\/summary>\r\n          <p>Yes. For space, satellite, and vacuum service, materials are screened for outgassing per NASA ASTM E595, with typical acceptance limits of TML (total mass loss) &le; 1.0% and CVCM (collected volatile condensable materials) &le; 0.10%. Low-outgassing, cleanroom-handled FFKM and silicone grades maintain vacuum leak-tightness and avoid contaminating optics and sensitive surfaces. Cryogenic (LOX, liquid nitrogen, liquid hydrogen) and oxygen-compatible options are also available &mdash; specify the media and cleanliness level on your RFQ.<\/p>\r\n        <\/details>\r\n      <\/div>\r\n\r\n      <!-- ============ SECTION 8: CLOSING CTA ============ -->\r\n      <h2>Get aerospace sealing support<\/h2>\r\n      <div class=\"aero-close\">\r\n        <div class=\"lane quote\">\r\n          <h3>Request a quote<\/h3>\r\n          <p>Send your AS568\/NAS1611 size, material spec, or controlled drawing. We quote standard and custom aerospace o-rings and seals, with domestic manufacturing available on request.<\/p>\r\n          <a class=\"btn-cta\" href=\"https:\/\/www.globaloring.com\/rfq\/\">Request a Quote &rarr;<\/a>\r\n        <\/div>\r\n        <div class=\"lane help\">\r\n          <h3>Talk to engineering<\/h3>\r\n          <p>Not sure which compound fits your fluid and temperature window? Our team helps match the material to your application and specification.<\/p>\r\n          <a class=\"btn-cta\" href=\"https:\/\/www.globaloring.com\/contact-us\/\">Contact Us &rarr;<\/a>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <!-- ============ INTERNAL LINK FOOTER ============ -->\r\n      <div class=\"aero-related\">\r\n        <h4>Related resources<\/h4>\r\n        <div class=\"grid\">\r\n          <a href=\"https:\/\/www.globaloring.com\/fluorosilicone-o-rings\/\">&rarr; Fluorosilicone (FVMQ) o-rings<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/viton-fkm-o-rings\/\">&rarr; FKM (fluorocarbon) o-rings<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/perfluoroelastomer-ffkm-o-rings\/\">&rarr; FFKM o-rings<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/epdm-o-rings\/\">&rarr; EPDM o-rings<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/buna-nitrile-o-rings\/\">&rarr; Nitrile (NBR) o-rings<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/silicone-o-rings\/\">&rarr; Silicone (VMQ) o-rings<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/ptfe-teflon-o-rings\/\">&rarr; PTFE o-rings<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/as568-size-chart\/\">&rarr; AS568 size chart<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/mil-spec-o-rings\/\">&rarr; Defense &amp; military seals<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/custom-molded-o-rings\/\">&rarr; Custom molded o-rings<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/american-made-oil-seals-o-rings\/\">&rarr; American-made oil seals &amp; o-rings<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/quality\/\">&rarr; Quality &amp; certifications<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/rapid-gas-decompression\/\">&rarr; Rapid gas decompression (RGD)<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/chemical-compatibility\/\">&rarr; Chemical compatibility lookup<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/o-ring-groove-design\/\">&rarr; O-ring groove design<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/o-ring-shelf-life\/\">&rarr; O-ring shelf life (AMS\/MIL)<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/blog\/aflas-vs-viton-vs-ffkm-o-ring-performance\/\">&rarr; Blog: FKM vs FFKM performance<\/a>\r\n          <a href=\"https:\/\/www.globaloring.com\/blog\/preventing-o-ring-extrusion-and-spiral-failure\/\">&rarr; Blog: preventing extrusion &amp; spiral failure<\/a>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <p class=\"aero-footnote\">Trade names referenced (e.g. Skydrol and Hyjet for phosphate-ester hydraulic fluids; Viton, the common name for fluorocarbon FKM) identify generic fluid and material chemistries. Trademarks are the property of their respective owners and are referenced for identification only. Temperature ranges and material recommendations on this page are general engineering guidance and are compound- and grade-dependent &mdash; verify against your program specification and controlled drawing before release.<\/p>\r\n\r\n    <\/main>\r\n  <\/div>\r\n<\/div>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"BreadcrumbList\",\r\n  \"@id\": \"https:\/\/www.globaloring.com\/aerospace-seals-o-rings\/#breadcrumb\",\r\n  \"itemListElement\": [\r\n    { \"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/www.globaloring.com\/\" },\r\n    { \"@type\": \"ListItem\", \"position\": 2, \"name\": \"Industries Served\", \"item\": \"https:\/\/www.globaloring.com\/industries-served\/\" },\r\n    { \"@type\": \"ListItem\", \"position\": 3, \"name\": \"Aerospace O-Rings & Seals\", \"item\": \"https:\/\/www.globaloring.com\/aerospace-seals-o-rings\/\" }\r\n  ]\r\n}\r\n<\/script>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"WebPage\",\r\n  \"@id\": \"https:\/\/www.globaloring.com\/aerospace-seals-o-rings\/#webpage\",\r\n  \"url\": \"https:\/\/www.globaloring.com\/aerospace-seals-o-rings\/\",\r\n  \"name\": \"Aerospace O-Rings & Seals | Fuel, Hydraulic & High-Temp\",\r\n  \"description\": \"Aerospace o-rings and seals for fuel, hydraulic (Skydrol), and high-temperature engine systems. FVMQ, FKM, EPDM, and FFKM in AS568 and NAS1611 sizes, USA-based with domestic manufacturing available.\",\r\n  \"inLanguage\": \"en-US\",\r\n  \"isPartOf\": { \"@id\": \"https:\/\/www.globaloring.com\/#website\" },\r\n  \"breadcrumb\": { \"@id\": \"https:\/\/www.globaloring.com\/aerospace-seals-o-rings\/#breadcrumb\" },\r\n  \"about\": [\r\n    { \"@type\": \"Thing\", \"name\": \"Aerospace fuel system seals\" },\r\n    { \"@type\": \"Thing\", \"name\": \"Aircraft hydraulic seals (phosphate ester \/ Skydrol)\" },\r\n    { \"@type\": \"Thing\", \"name\": \"High-temperature engine and turbine seals\" },\r\n    { \"@type\": \"Thing\", \"name\": \"Fluorosilicone (FVMQ) aerospace o-rings\" }\r\n  ],\r\n  \"audience\": {\r\n    \"@type\": \"Audience\",\r\n    \"audienceType\": \"Aerospace design engineers, procurement and supply-chain professionals, MRO buyers\"\r\n  },\r\n  \"potentialAction\": [\r\n    {\r\n      \"@type\": \"Action\",\r\n      \"name\": \"Request a Quote\",\r\n      \"target\": \"https:\/\/www.globaloring.com\/rfq\/\"\r\n    }\r\n  ]\r\n}\r\n<\/script>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"FAQPage\",\r\n  \"@id\": \"https:\/\/www.globaloring.com\/aerospace-seals-o-rings\/#faq\",\r\n  \"mainEntity\": [\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What o-ring material is used in aircraft fuel systems?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Fluorosilicone (FVMQ) is the standard o-ring material for aircraft fuel systems. It resists hydrocarbon jet fuels (Jet A, JP-4, JP-5, JP-8) while staying flexible at the very low temperatures encountered at altitude, roughly -75F to +350F. Fluorocarbon (FKM) is also used where the fuel runs hot but extreme cold is not a factor. Standard nitrile is generally not used in modern aircraft fuel systems because it cannot match the temperature range.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What seal material is compatible with Skydrol hydraulic fluid?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"EPDM is the seal material compatible with Skydrol and other phosphate-ester aviation hydraulic fluids such as Hyjet. Phosphate esters chemically attack nitrile (NBR) and fluorocarbon (FKM), causing them to swell and fail, so commercial aircraft hydraulic systems running these fluids use EPDM o-rings and seals. EPDM must not be used in petroleum-based hydraulic systems, where nitrile or fluorocarbon is required instead.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What is fluorosilicone (FVMQ) used for in aerospace?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Fluorosilicone (FVMQ) is used in aerospace wherever a seal must resist fuel and oil while remaining flexible in extreme cold. It combines the fuel resistance of fluorocarbon with the low-temperature flexibility of silicone, making it the default material for aircraft fuel tank seals, fuel line fittings, and fuel pump seals. Typical specifications include AMS 7379 and MIL-DTL-25988.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What temperature range do aerospace o-rings need to handle?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Aerospace o-rings can see from about -65F to -75F at altitude up to +400F or higher near engines and turbines, so the required range depends on the location. Fluorosilicone covers the low end with fuel resistance; FKM covers high-temperature fuel and oil; FFKM extends continuous service to roughly +600F; silicone offers the widest range for static, non-fuel applications. Select the compound for the specific temperature window of the application.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Do you supply aerospace and mil-spec o-rings to AMS, MIL, and NAS standards?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Yes. We supply o-rings and seals to AS568 and NAS1611 size standards and work from AMS material specifications (such as AMS 7276 for FKM and AMS 7379 for fluorosilicone), MIL-DTL\/MIL-PRF specifications, and MS part-number callouts. Send your specification or controlled drawing with a quote request and we will quote to it.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can you provide domestically manufactured aerospace seals?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Yes. We are a US-based supplier and offer domestic manufacturing on request for o-rings and seals, which supports Buy American, DFARS, and program-specific domestic-content and supply-chain-traceability requirements common in aerospace and defense work. Standard inventory is available for prototyping, and custom molded production is available to your drawing.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What material should I use for high-temperature aerospace engine seals?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Use fluorocarbon (FKM) for most high-temperature aerospace engine and accessory seals; it handles roughly -15F to +400F with strong fuel and oil resistance and is compatible with synthetic turbine engine oils (MIL-PRF-23699, MIL-PRF-7808). Step up to perfluoroelastomer (FFKM) when the application combines extreme heat (up to about +600F continuous) with aggressive chemical exposure.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Are FFKM o-rings rapid gas decompression (RGD) resistant?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"High-modulus FFKM grades, typically at 90 Shore A durometer, are formulated to resist rapid gas decompression (RGD), also called explosive decompression (ED). RGD occurs when gas dissolved into the elastomer under pressure expands and ruptures the seal as system pressure drops quickly. For high-pressure pneumatic, bleed-air, and gas-charged applications, specify an RGD-resistant high-modulus FFKM or a specially compounded FKM.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Do you supply low-outgassing seals for space and vacuum applications?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Yes. For space, satellite, and vacuum service, materials are screened for outgassing per NASA ASTM E595, with typical acceptance limits of TML (total mass loss) <= 1.0% and CVCM (collected volatile condensable materials) <= 0.10%. Low-outgassing, cleanroom-handled FFKM and silicone grades maintain vacuum leak-tightness. Cryogenic (LOX, liquid nitrogen, liquid hydrogen) and oxygen-compatible options are also available; specify the media and cleanliness level on your RFQ.\"\r\n      }\r\n    }\r\n  ]\r\n}\r\n<\/script>\r\n\r\n\r\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Aerospace O-Rings &amp; Seals Flight-critical sealing for fuel, hydraulic, pneumatic, and high-temperature engine systems. We supply aerospace-grade elastomer o-rings and seals &mdash; fluorosilicone for jet fuel, EPDM for phosphate-ester (Skydrol) hydraulics, FKM and FFKM for high-temperature service &mdash; in AS568 and NAS1611 sizes, with domestic manufacturing available for defense and supply-chain-sensitive programs. AS9100 &middot; ITAR <a href=\"https:\/\/www.globaloring.com\/aerospace-seals-o-rings\/\">[&hellip;]<\/a><\/p>\n","protected":false},"author":44544,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-427923","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.globaloring.com\/wp-json\/wp\/v2\/pages\/427923","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.globaloring.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.globaloring.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.globaloring.com\/wp-json\/wp\/v2\/users\/44544"}],"replies":[{"embeddable":true,"href":"https:\/\/www.globaloring.com\/wp-json\/wp\/v2\/comments?post=427923"}],"version-history":[{"count":11,"href":"https:\/\/www.globaloring.com\/wp-json\/wp\/v2\/pages\/427923\/revisions"}],"predecessor-version":[{"id":427934,"href":"https:\/\/www.globaloring.com\/wp-json\/wp\/v2\/pages\/427923\/revisions\/427934"}],"wp:attachment":[{"href":"https:\/\/www.globaloring.com\/wp-json\/wp\/v2\/media?parent=427923"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}