Global O-Ring Size Chart & Reference
Find standard dimensions for AS568, JIS B2401, and more.
AS568 Standard
The Aerospace Standard for O-rings, widely used in the USA and globally. Browse all 379 sizes.
JIS B2401
Japanese Industrial Standard sizes including P (Moving), G (Fixed), V (Vacuum), and S series.
Materials Guide
Detailed information on Viton, NBR, EPDM and other O-Ring materials.
Tools & Calculators
Access our free O-Ring Gland Calculator, Compression Rate Calculator, and Unit Converter.
Why Use ORingSpec?
ORingSpec provides the most accurate and up-to-date dimensional data for O-rings.