Answer
May 30, 2025 - 10:40 AM
To measure a 3/8 NPT (National Pipe Thread) fitting, you should measure the outside diameter of the threaded portion and count the number of threads per inch (TPI). For a 3/8 NPT fitting, the nominal outside diameter is approximately 0.675 inches, and it typically has 18 threads per inch. Remember, NPT fittings are tapered, so measurements may vary slightly along the length of the threads.
