The 3-part SAE union consists of a union body, union nut and support sleeve. It connects and seals the pipe flared at 37°. The sealing and retaining function to the flared pipe is purely metallic. The design of the fitting allows the use of pipes in both metric and imperial dimensions for the ranges 6 mm - 42 mm or 1/8" - 1 1/2". The fittings are manufactured from drawn or forged stainless steel with material no. 1.4401 / 1.4571 with factory acceptance certificate to DIN 50049/3.1. The pressures range from 100 to 350 bar, whereby a pressure reduction must be taken into account above +20° C. The dimensions are based on ISO 8434-2 and the SAE standards.