International O-ring sizes
An O-ring, or toroidal seal, is the most common type of seal used in the world today.
Used to form a physical barrier to prevent the mixing of gases or liquid fluids, the simple toroidal shape of an O-ring has proven to offer high sealing efficiency across a wide range of applications.
PPE manufactures elastomer O-rings from a broad range of material grades to the following international standard O-ring sizes.
Need help sizing your hardware for standard sized O-rings? Visit our O-ring groove dimension look-up tool.
AS 568
SAE (Society of Automotive Engineers) Standard O-ring sizes
British 500-800
British Standard extended series 500-800 O-ring sizes (imperial)
ISO 3601
International Organisation for Standardisation (metric O-rings)
JIS B 2401
Japanese Industrial Standard (P, G and V) metric O-ring sizes
Additional resources
Need some further help or information? Take at look at these resources or send us an enquiry using the form below.
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O-ring size (no tooling charge)
O-ring groove dimensions calculator
