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NPT or NPTF
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When referring to thread sizes, what is the difference between NPT and NPTF?
Also, what do they stand for?
Also, what do they stand for?
Answers
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American National Standard Pipe Threads
NPT: National Pipe Taper Thread
A sealant compound or Teflon tape must be used for a leak-free seal.
FPT: female (internal) National Pipe Taper threads
MPT: male (external) National Pipe Taper threads
NPTF: Dryseal American National Standard Taper Pipe Thread
No sealant is needed for a seal.
NPS: American Standard Straight Pipe Thread
Used for mechanical joining -- holding a fitting in place. An O-ring or a metal seal is required.
NPSF: Dryseal American National Standard Straight Pipe Thread
British Standard Pipe Thread
BSPT: British Standard Pipe Taper threads
BSPP: British Standard Pipe Parallel (straight) threads
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