Boss, Face, and Flange O-Rings Overview
Used commonly in hydraulic settings, Boss o-rings, O-Ring Face Seals, and Flange o-rings are relied on to provide an efficient, secure seal in high-pressure applications. All three types have their own specific set of sizes related to their associated fittings. These o-ring sizes can be bought in kits or individual sizes. Click any of the following o-ring types to jump to their respective sections.
900 Series Boss o-rings are used in sealing straight thread tube Boss fittings (ORB) associated with hydraulic equipment. Boss o-rings are recommended by the National Fire Protection Association (NFPA) for medium and high-pressure hydraulic systems. Boss o-ring sizes fall under the AS568 900 Series classification. Nitrile 90 Durometer o-rings are typically used, however, a multitude of o-ring compounds come in Boss sizes.SHOP FOR K-BOSS O-RING KITS
Boss O-Ring Size Chart
Boss o-ring sizes and corresponding dimensions are shown in the interactive table below. The first column references the Tube Outside Diameter associated with the o-ring measurements. Dash Numbers in the second column link to their specific size filtering in our online store.
|Tube OD||AS568 Dash #||CS Inch||ID Inch|
O-Ring Face Seals (ORFS)
SAE O-Ring Face Seal (ORFS) fittings are also used to seal hydraulic systems. These o-rings sit within the face of the fitting to create a seal between two connected metal surfaces. When the connection is tightened, the o-ring compresses against a flat face of the mating fitting or tube. O-Ring Face Seal sizes fall under the AS568 Zero Series classification. Though Nitrile 90 Durometer o-rings are mostly used, there are many o-ring compounds that are available in Face sizes.SHOP FOR K-FACE O-RING KITS
O-Ring Face Seal (ORFS) Size Chart
O-Ring Face Seal sizes and corresponding dimensions are shown in the interactive table below. The first column references the ORS Tube Size associated with the o-ring measurements. Dash Numbers in the second column link to their specific size filtering in our online store.
|ORS Tube Size||AS568 Dash #||CS Nominal||ID Nominal||OD Nominal||CS Inch||ID Inch|
SAE 4-Bolt Flange o-rings seal high-pressure fluid systems such as pipes, pumps, and valves. Flange connector assemblies are flat metal surfaces that are bolted together (with an o-ring gasket) to form a sealed connection. Flange connections can also be disassembled for easy access to modify the system, clean, or inspect it. Flange o-ring sizes are contained within the AS568 200 Series classification. Nitrile 90 Durometer o-rings are mostly utilized, though multiple o-ring compounds are available in Flange sizes.SHOP FOR K-FLANGE O-RING KITS
If you require more information on Boss o-rings, O-Ring Face Seals, or Flange o-rings, please give us a call at 832-448-5550 or fill out the Product Inquiry Form to receive a quote or more information.SHOP FOR K-COMBO O-RING KITS
Flange O-Ring Size Chart
Flange o-ring sizes and corresponding dimensions are shown in the interactive table below. Nitrile 90 Durometer Flange o-rings are Code 61 (up to 3,000 PSI) and Code 62 (up to 6,000 PSI), the standard and high-pressure classes. The first column references the flange size in inches. Dash Numbers in the second column link to their specific size filtering in our online store.
|SAE Flange Size||AS568 Dash #||Tubing Dash Size||CS Nominal||ID Nominal||OD Nominal||CS Inch||ID Inch|