What is MPT / FPT? What is NPT? Pipe Thread Acronyms

MPT and FPT are simply names for identifying the type of pipe thread for an application. MPT and FPT are both sub-types of NPT.

National Pipe Threads (NPT) have tapered threads. NPT threads are used for joining and sealing pipe fittings in low pressure air or liquid applications.

Definition of Pipe Thread Acronyms

NPT National Pipe Thread (tapered)
FPT Female Pipe Thread (interchangeable with NPT)
FIP Female Iron Pipe (interchangeable with NPT)
MPT Male Pipe Thread (interchangeable with NPT)
MIP MaleIron Pipe (interchangeable with NPT)


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