1. BS 1806. ‘Specifícation for dimensions of toroidal sealing rings (“O”-rings) and their housings (inch series)’. British Standards Institution.
2. AS 568B, ‘Aerospace size standard for O-rings’, SAE.
3. ISO 16032-1, ‘Aerospace fluid systems — O-rings, inch series: inside diameters and cross sections, tolerances and size-identification codes. Part 1: Close tolerances for hydraulic systems’. ISO 16032-2, ‘Aerospace fluid system — O-rings, inch series: inside diameters and cross sections, tolerances and size-identification codes. 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.