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.

You can view a complete AS568 O-Ring Chart Here

Material Type
Durometer
Measurement Type
Cross Section ?
Inside Diameter ?
Part Number

Select O-ring Material Type:

Select Durometer:

Measurement Type:

Standard AS568 O-Ring Lookup

Selected O-Ring Details

Detailed AS568 O-Ring Information

Standard AS568 O-Ring Material Information

Chemical Description	Please Select a Material Type
Abbreviations (ASTM 1418)
ISO / DIN
Other Trade Names
ASTM D2000 Designations
Low Temperature Range
High Temperature Range

Material Details

General Material Description

Please Select a Material Type
Primary Uses:
Not Recommended:

*For More Information Please Click Here

AS568 Standard O-ring Sizes
Cross Section		Dash Number	Product Data Sheet
Nominal	Actual	Dash Number	Product Data Sheet
1/16"	.070"	001 thru 050	0 dash series o rings
3/32"	.103"	102 thru 178	100 series o rings
1/8"	.139"	201 thru 284	200 series o rings
3/16"	.210"	309 thru 395	300 series o rings
1/4"	.275"	425 thru 475	400 series o rings
***	***	901 thru 932	900 series o rings
Complete AS-568 reference guide

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.

Viton ® is a registered trademarks of E. I. du Pont de Nemours and Company or affiliates