... , SH3409,HG/T21635,DL/T695,SY/T0510, DIN2617Pipe cap: A type of pipe fitting, usually liquid or ... threaded end and the other end closed off. If a solvent weld cap is used to provide for a ... must be left before the cap. This is because when the cap is cut off for the future connection, enough ... onto it. In plumbing systems that use threads, the cap has female threads. Industrial caps can be round, square ...