1. ISO 3601, Fluid power systems – O-rings. Part 1: Inside diameters, cross-sections, tolerances and designation codes. Part 2: Housing dimensions for general applications. Part 3: Quality acceptance criteria. Part 4: Anti-extrusion rings (back-up rings). Part 5: Suitability of elastomeric materials for industrial applications.
2. AS 568 B, Aerospace size standard for O-rings, SAE.
3. ISO 16032, Aerospace fluid systems – O-rings, inch series: inside diameters and cross sections, tolerances and size-identification codes. Part 1: Close tolerances for hydraulic systems. Part 2: Standard tolerances for non-hydraulic systems.
4. BS 4518, Specification for Metric Dimensions of Toroidal Sealing Rings (“O”-rings) and their Housings, British Standards Institution.
5. SMS 1588, Metric O-rings, Installation Dimensions, Swedish Standards Institute.