O-Rings

/O-Rings
O-Rings 2019-07-09T14:32:56+00:00

The Highest Quality O-Rings Available When You Need Them

With one of the largest inventories of o-rings, cord stock, and related seals (square rings, x-rings, backup rings, and more) in North America, we’re committed to providing the right product at the right price to every customer. Our technical sales team is experienced and knowledgeable about o-rings and their application. Because of this, we provide customers with guidance that ensures the optimal solution.

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Global O-Ring offers the full line of AS568 Size O-Rings in the following materials:

View our AS568 Size Chart for a full listing of all sizes and dimensions.

Common Compounds

Compound Material Data Sheet Description Durometer Color Temp Range (F)
A80 AFLAS General purpose 80 Black -14 to +428
N70 Buna-N General purpose 70 Black -40 to +212
N90 Buna-N General purpose 90 Black -40 to +212
V75 Viton High chemical resistance 75 Black -15 to +450
BV75 Viton High chemical resistance 75 Brown -15 to +450
V90 Viton High chemical resistance 90 Black -15 to +450
E70 EPDM General purpose 70 Black -67 to +257
S70 Silicone FDA-Grade 70 Red -76 to +437

Additional Compounds

Compound Material Data Sheet Description Durometer Color Temp Range (F)
N50 Buna-N (Nitrile, NBR) General purpose 50 Black -40 to +212
N70LT Buna-N (Nitrile, NBR) General purpose, low temp resistance 70 Black -67 to +212
WN70 Buna-N (Nitrile, NBR) General purpose 70 White -40 to +212
N90PC Buna-N (Peroxide-cured) General purpose 90 Black -20 to +275
V1238 FKM RGD Parker V1238 High chemical resistance 95 Black -15 to +400
N90RGD FKM RGD V90RGD High chemical resistance 90 Black +5 to +428
P6001C FFKM (Perfrez) Heat/Chemical resistance 75 Black Varies
P9001C FFKM (Perfrez) Heat/Chemical resistance 80 Black Varies
P9021C FFKM (Perfrez) Heat/Chemical resistance 90 Black Varies
K4079 FFKM (Kalrez) Heat/Chemical resistance 75 Black Varies
K6375 FFKM (Kalrez) Heat/Chemical resistance 80 Black Varies
K1050LF FFKM (Kalrez) Heat/Chemical resistance 90 Black Varies
F70 Fluorosilicone (FVMQ) FDA-Grade, food safe, medical applications 70 Blue -76 to +350
HNBR70 HNBR Heat/Chemical resistance 70 Black -40 to +302
HNBR80 HNBR Heat/Chemical resistance 80 Black -40 to +302
HNBR90 HNBR Heat/Chemical resistance 90 Black -40 to +302
HSN70 HSN Heat/Chemical resistance 70 Green -40 to +303
HSN80 HSN Heat/Chemical resistance 80 Green -40 to +303
HSN90 HSN Heat/Chemical resistance 90 Green -40 to +303
C70 Neoprene Environmental resistance 70 Black -40 to +212
U70 Polyurethane Oil/Fuel resistance 70 Clear -40 to +264
U90 Polyurethane Oil/Fuel resistance 90 Clear -40 to +264
S50 Silicone FDA-Grade, food safe, medical applications 50 Red/Rust -76 to +437
S60 Silicone FDA-Grade, food safe, medical applications 60 Red/Rust -76 to +437
TEF PTFE (Teflon) FDA-Grade, high heat/chemical resistance 55-60 Shore D White -328 to +500
TEV PTFE Encapsulated Viton FDA-Grade, oil/fuel resistance 90-95 Clear/Black -76 to +428
TES PTFE Encapsulated Silicone FDA-Grade, high/low temp resistance 85-90 Clear/Red -76 to +428

What is an O-Ring?

An o-ring is a round, mechanical gasket designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface. O-rings are one of the most common types of seals because they’re inexpensive, reliable and have simple mounting requirements. Since they are known as one of the most important elements of machine design, o-rings may be used in static applications, where little range of motion is required. O-rings may be used in dynamic applications, like rotating pump shafts and hydraulic cylinder positions, also. (See O-ring size chart)

Material:

Material matters. Due to this, selecting an o-ring material for a specific application is dependent on many criteria, including what’s being sealed, temperature range, pressure, dynamic or static service, desired service life, installation considerations, tolerances and many more. To learn which o-ring materials will work best in your application, review our Material Selection Guide.

Durometer:

Determining durometer isn’t hard.  The hardness of rubber compounds is measured by the Shore A durometer; the higher the durometer, the harder the compound. In addition, softer compounds stretch easier and seal better on rough surfaces. Harder compounds offer greater abrasion resistance and resistance to extrusion. To learn more about durometer, click here.

Color:

There’s more to o-rings than meets the eye. Specific color standards are routinely used to help visually identify the type of o-ring installed for certain industries. Because of this, we stock o-rings in the most common colors, materials and compounds. View our colors here.

Metric O-rings:

Global O-Ring and Seal offers a large selection of Metric O-Ring sizes in various compounds. A “Metric O-Ring” simply means that the size of the o-ring is defined in millimeters. Learn More.

Custom Molded O-Rings:

Beyond our huge inventory of more than 50 million o-rings in all standard materials and sizes, if you’re looking for a custom size o-ring for any cross sections larger than the AS568 400 Series (.275” CS) and/or an ID larger than the largest ID for that series, we’re your go-to provider. Learn More.

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