How To Measure Pipe Thread. Inner diameter of a female thread. All our fittings & valves are measured using npt.
2.) second, use a thread pitch gauge to identify the number of threads per inch. To be sure that the threads will match, you can also count the threads per inch (tpi). Use a thread pitch gauge to determine the number of threads per inch or the distance between threads in metric connections.
Use a thread pitch gauge to determine the number of threads per inch or the distance between threads in metric connections.
Measure the outside diameter (od) of your pipe or pipe fitting: When measuring a female pipe thread (fpt), measure the od of the pipe itself and subtract ¼ inch to find the correct pipe thread size. For metric connections, measure the distance between threads. You’d have to measure the outer diameter of a male vs.