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IndustryArena Forum > Manufacturing Processes > Turning > 1/2-14 of npt.thread dimensions

Thread: 1/2-14 of npt.thread dimensions

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  1. 01-30-2020, 09:48 PM #1
    Edl44251
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    1/2-14 of npt.thread dimensions

    What are the dimensions for turning a 1/2-14 npt thread . Before threading. Diameter at small end and large end and length of taper
    Machinery handbook about as clear as mud. Maybe give me same info for 3/8-18 also
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  2. 01-30-2020, 10:25 PM #2
    machinehop5
    machinehop5 is offline Banned
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    Re: 1/2-14 of npt.thread dimensions

    https://en.wikipedia.org/wiki/National_pipe_thread
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  3. 01-30-2020, 11:02 PM #3
    Edl44251
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    What would the dia be at the small end. .840 at large end
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