Astm A105 Carbon Steel Forged Fitting Npt Bspt Coupling

Internal connection includes coupling or female thread  direct, external connection includes male pipe nipple or outer wire direct; outer wire direct is also called male pipe nipple; similarly, inner tooth direct is also called female thread  direct; wire and tooth refer to the metal part of pipe fittings. Thread, the inner thread refers to the inner thread of the pipe fitting, and the outer thread is the outer thread of the pipe fitting. The female thread  is directly used to connect threaded equipment, such as water meters, valves and other metal or threaded interfaces, and can also be used to connect faucets. It has almost the same meaning as the female thread  elbow, that is, one is straight and the other is curved.