Fast Dash^TM AS568 O-ring Utility

To get the dimensions of an AS-568A o-ring enter the 3-digit dash number and then press submit to get your "Fast Dash^TM" answer.

Dash No.   

To get a dash number based on dimensions select the cross-section and either the actual ID, or the actual OD. Then press submit to get your "Fast Dash^TM" answer.

Cross-Section (inches):

.070

.103

.139

.210

.275

Actual ID 
Actual OD  

For Metric (mm) - click here

Fast Dash^TM O-ring Application Design Guide

Use our free design tables for AS-568A standard industrial reciprocating and static o-ring applications. Select the type of application you are designing for to view the corresponding design guidelines:

• Rod Seal - I.D. designed
• End Cap Seal - I.D. designed
• Piston Seal - O.D. designed
• Plug Seal - O.D. designed
• Flange Seal - O.D./I.D. designed

AS-568A Dash Numbers and Cross-section Table

O-RING SIZE AS-568 Dash Numbers	Cross Section Nominal inches	Cross Section Actual in. (mm)	Tolerance +/- in. (mm)
-004 thru -050	1/16	.070 (1.78)	.003 (.076)
-102 thru -178	3/32	.103 (2.62)	.003 (.076)
-201 thru -284	1/8	.139 (3.53)	.004 (.102)
-309 thru -395	3/16	.210 (5.33)	.005 (.127)
-425 thru -475	1/4	.275 (6.99)	.006 (.152)

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