Threading (manufacturing)

helical part of screw

guage to find the pitch of threads

process of making a screw thread

hand tool used to turn taps or other small tools

Trapezoidal thread forms

The Stahlpanzerrohrgewinde (, "steel conduit thread") standard for screw threads, more often called by the shortened Panzergewinde (), was a technical standard created in Germany and subsequently used in Switzerland, Austria, and other neighboring European countries. It has been retracted. The thread is used to join pieces of electrical conduit and cable glands.

screw thread profile with a rounded cross-section

Asymmetric thread profile which allows for low friction and the ability to handle greater loads in one direction, at the cost of higher friction and inferior load bearing in the opposite direction