Fluid systems -- Sealing devices -- O-rings -- Part 1: Inside diameters, cross-sections, tolerances and size identification code
The dimensions and tolerances specified in this part of ISO 3601 are suitable for any elastomeric material provided the suitable tooling is available. The figure shows the typical O-ring configuration. Table 2 contains the series G (general purpose applications), and table 3 the series A (aerospace applications). This second edition cancels and replaces the first edition (1978).