Seals Eastern manufactures precision molded rubber seals, gaskets, and o-rings. Seals Eastern, Inc.
O-ring Application Design Guidelines
134 Pearl Street
Red Bank, NJ 07701 USA
Tel: 732.747.9200  Fax: 732.747.3647 		 

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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

PISTON SEAL - O.D. designed

FLANGE SEAL - O.D. & I.D. designed

END CAP SEAL - I.D. designed

PLUG SEAL - O.D. designed

"Fast Dash"™   
To get the dimensions of an AS-568A o-ring submit the dash number. 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" answer.

Dash No.    For Metric units - click here
Cross-Section: (inches)
.070 .103 .139 .210 .275
Actual ID 
Actual OD 

For HELP with FastDash, please contact us!
Need an AS-568A AFLAS® O-ring  overnight? Visit "OringOnline"®.

AS-568A Dash Numbers and Cross-section Table

O-RING SIZE
AS-568
Dash Numbers

 Cross Section
Nominal
inches		 Cross Section
Actual
inches
Tolerance
+/- inches
-004 thru -050 1/16 .070 .003
-102 thru -178 3/32 .103 .003
-201 thru -284 1/8 .139 .004
-309 thru -395 3/16 .210 .005
-425 thru -475 1/4 .275 .006
Seals Eastern, Inc., is an engineering and manufacturing firm, founded in 1960, with the resources to design, manufacture, and deliver high quality elastomer seals, gaskets, and o-rings for the most demanding seal applications throughout the world. Click here to learn more about Seals Eastern

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