National Fine Thread, a pipe thread standard, similar to NPT of the American National Standard Pipe Thread, and UNF of the Unified Thread Standard. Used for more exacting assemblies, NFT threads range from 64 TPI (very fine) to a large eight TPI. National Fine Threads also have the same 60-degree pitch angle (the "tilt" or "taper" of the threads from a straight plumb line) with matching male and female pitch.
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