... ,SH3408, SH3409,HG/T21635,DL/T695,SY/T0510, DIN2617Pipe cap: A type of pipe fitting, usually liquid or gas ... male thread of a pipe or a nipple. A cap may have a solvent weld socket end or a ... the other end closed off. If a solvent weld cap is used to provide for a future connection point, ... onto it. In plumbing systems that use threads, the cap has female threads. Industrial caps can be round, square, ...