Standard O-rings sizes are available in several different material types. Common material types include Nitrile, HNBR, Silicone, Fluorosilicone, Fluorocarbon (Viton®), EPDM, Neoprene, and Butyl. For more information visit our materials page.

Speciality o-rings can be made to AS568 standards. For special material types custom sizes, modifications, coatings or high volume, OEM pricing please visit our online RFQ form.

If you need assistance with material type selection please contact us. For standard material types you can visit our online ordering section.

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AS568 Size Chart » Standard O-Ring Sizes

AS568 O-Ring Sizes » Standard AS568 O-Rings

AS568 O-rings are the US standard oring reference system. The AS568 O-ring system was developed by the Society of Automotive Engineers (SAE). The AS568 system uses a dash “ - ” to refer to standardized O-ring sizes. This standardized reference system allows engineers to prototype or test designs based off of the as568 O-ring sizes.

Standard AS568 O-Ring Lookup

Selected O-Ring Details

Detailed AS568 O-Ring Information

Material Details

General Material Description