ISO 16031-1:2002 Preview
Aerospace fluid systems -- O-rings, inch series: Inside diameters and cross sections, tolerances and size-identification codes -- Part 1: Close tolerances for hydraulic systems
This standard was last reviewed and confirmed* in 2013.
*Therefore this version remains current
ISO 16031-1 specifies the inside diameters, cross-sections, tolerances and size identification codes for inch O-rings used in aerospace fluid systems.
The dimensions and high precision tolerances specified in ISO 16031-1 are suitable for nitrile and ethylene propylene materials intended for use in high pressure hydraulic fluid systems provided that suitable tooling be available.