AS568 O-Rings Sizes » Standard AS568a 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.

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You can view a complete AS568 O-Ring Chart Here
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AS568 Standard Orings
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Standard AS568 O-Ring Size Information

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Standard AS568 O-Ring Material Information
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AS568 O-Rings

AS568 Size Chart » Standard O-Ring Sizes

Cross Section
Dash Number
Product Data Sheet
Nominal
Actual
1/16"
.070"
001 thru 050
3/32"
.103"
102 thru 178
1/8"
.139"
201 thru 284
3/16"
.210"
309 thru 395
1/4"
.275"
425 thru 475
***
***
901 thru 932
Standard O-ring Reference Guide
AS568 O-Ring Slab Material

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, and 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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