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Library › Hardware › NPT male thread envelopes 1/8 to 1 in

npt-1-male

1 NPT male, major OD 33.4 mm, 11.5 TPI, 17.3 mm effective thread length (L2); plain cylinder at OD (taper not modeled)

Exact dimensions. True size, no printing tolerance added. Threads are plain cylinders at the major diameter.

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From the full sheet

NPT male thread envelopes 1/8 to 1 in (ASME B1.20.1): every size, notes, mating features and sources. What is the outside diameter of a 1/4 NPT thread and the drill size for it?

Other sizes