AS568

AS568 O-Ring Sizes — Complete Standard Size Tables & Material Guide

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What is AS568? AS568 is the standard that defines o-ring sizes in the United States. Every standard o-ring you’ll encounter in American engineering has a “dash number” (like -214 or -028) that maps to specific inner diameter (ID) and cross-section (CS) dimensions. The dash number tells you everything: First digit = cross-section series (0XX = … Read more

400 Series Standard O-Ring Sizes 350–439 (AS568)

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400 Series — Cross-Section: 0.275″ This table lists all standard o-ring sizes in the AS568 400 series (dash numbers 350–439). All o-rings in this series have a cross-section diameter of 0.275″. The inner diameter (ID) ranges from 0.176″–26.940″. Need help designing a groove for these o-rings? See the Static O-Ring Groove Design Guide. For other … Read more

300 Series Standard O-Ring Sizes 265–349 (AS568)

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300 Series — Cross-Section: 0.210″ This table lists all standard o-ring sizes in the AS568 300 series (dash numbers 265–349). All o-rings in this series have a cross-section diameter of 0.210″. The inner diameter (ID) ranges from 4.975″–22.940″. Need help designing a groove for these o-rings? See the Static O-Ring Groove Design Guide. For other … Read more

200 Series Standard O-Ring Sizes 201–264 (AS568)

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200 Series — Cross-Section: 0.139″ This table lists all standard o-ring sizes in the AS568 200 series (dash numbers 201–264). All o-rings in this series have a cross-section diameter of 0.139″. The inner diameter (ID) ranges from 0.171″–16.955″. Need help designing a groove for these o-rings? See the Static O-Ring Groove Design Guide. For other … Read more

100 Series Standard O-Ring Sizes 115–178 (AS568)

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100 Series — Cross-Section: 0.103″ This table lists all standard o-ring sizes in the AS568 100 series (dash numbers 115–178). All o-rings in this series have a cross-section diameter of 0.103″. The inner diameter (ID) ranges from 0.487″–11.196″. Need help designing a groove for these o-rings? See the Static O-Ring Groove Design Guide. For other … Read more

000 Series Standard O-Ring Sizes 001–114 (AS568)

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000 Series — Cross-Section: 0.070″ This table lists all standard o-ring sizes in the AS568 000 series (dash numbers 001–114). All o-rings in this series have a cross-section diameter of 0.070″. The inner diameter (ID) ranges from 0.029″–5.234″. Need help designing a groove for these o-rings? See the Static O-Ring Groove Design Guide. For other … Read more