This standard BS EN 3630:2008 Aerospace series. Fluid fittings, flanged, straight. Sealing by O-ring for 0,8 mm thick tubes is classified in these ICS categories:
49.080 Aerospace fluid systems and components
The purpose of this standard is to define the characteristics of the fluid fittings, flanged, straight, sealing by O ring, for 0,8 mm thick tubes. NOTE Flanged fitting installation hole and assembly, see EN 3633 and TR 3634.