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.

Perlast perfluoroelastomer (FFKM) O-rings can be manufactured to any of the following international
O-ring standard sizes:-

SAE AS568 American Standard O-ring sizes
British Standard BS1806 O-ring sizes (imperial) - replaced by ISO3601 standard
British Standard BS4518 O-ring sizes (metric)
British Standard extended series 500-800 O-ring sizes (imperial)
ISO3601 International Organisation for Standardisation O-ring sizes
German Standard DIN3771 O-ring sizes
Le Joint Français 'R' O-ring sizes
Japanese Standard JIS B 2401 (P, G and V) O-ring sizes

AS568 O-ring sizes BS1806 O-ring sizes BS4518 O-ring sizes 500-800 BS O-ring sizes ISO3601 O-ring sizes DIN3771 O-ring sizes LJF R O-ring sizes JIS B 2401 O-ring sizes Perlast FFKM O-rings