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The difference between PT and NPT threads

YAMAWA MFG. Co., Ltd.>Support & Inquiry>Bag Full of Wisdom when you are in trouble>The difference between PT and NPT threads
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Cutting Taps Pipe Threads Standard (Screw Threads, Center Holes)Tool Selection
Can you please tell me the difference between "PT and "NPT"?
The difference between "PT" and "NPT" is thread angle, basic profile and number of threads. This is the reason that taps and dies are not interchangeable. We have explained the difference between "PT" and "NPT" pipe taps in the previous article, but we'll explain about screws threads this time.

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