O-Ring Groove Design: Squeeze and Gland Fill Done Right
How to design an O-ring groove: target squeeze, 60-85% gland fill, and an AS568-214 worked example for a static radial seal.
AS568
O-Ring Gland Design: Squeeze and Groove Sizing with AS568
Design an O-ring groove that actually seals. AS568 dash numbers, squeeze targets, gland fill limits, and a full worked example for a -214 ring.
O-Ring Groove Design: Sizing a Gland for Static Seals
Design an O-ring gland right: squeeze, gland fill, and clearance targets plus a full AS568 -214 static seal worked example for groove depth and width.
Selecting an O-Ring: Material, Gland Geometry, and Squeeze Fundamentals
A practical O-ring selection guide: how to read AS568 dash numbers, choose elastomer compounds, set gland squeeze and stretch, and avoid the four most common seal failures.
AS568 O-Ring Sizes — Complete Standard Size Tables & Material Guide
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)
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)
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)
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)
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)
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