Inch, pipe taps. Differences, designation examples. Pipe, G, K.
In addition to taps for metric threads, in our country, taps for difficult connections are also used. These are called inch taps. Inch taps are divided into cylindrical and conical threads. Examples of pipe thread designations: G is cylindrical, K is conical (the angle at the apex of the thread is 55°). Threads are used in water and gas pipelines, as well as in drain plugs in car blocks, where a drain cock is usually located. In particular, the Volga uses a plug with this thread.