What is NPT Thread & NPT Thread Dimensions - NPT Thread Size Chart
https://www.cnclathing.com/guide/what-is-npt-thread-npt-thread-dimensions-npt-thread-size-chart-cnclathing
Web ResultMay 24, 2021 · NPT Thread Sizes. – Commonly used NPT thread sizes including 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1+1/4, 1+1/2, 2, 2+1/2, 3, 4, 5, and 6 inches, can be found on most U.S pipes and fittings. The thread sizes smaller than 1/8 inch and larger than 6 inches are occasionally used for specific purposes.
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