This International Standard establishes a system for sealing the port connection of couplings used in the aerospace industry.
It specifies dimensions to achieve interchangeability of the port connection, the fitting end and a seal. The seal may be a standard O-ring or a special ring.
BS 2M 63:1993 history
1993BS 2M 63:1993 Specification for dimensions of aerospace fluid system port connection, seal and fitting end