As everyone has indicated FNPT is Female National Pipe thread Tapered, and conversely MNPT is Male National Pipe thread Tapered. I run across this all the time in the oil fields.What is FNPT thread type?
FPT (FIPT) – aka Female (Iron) Pipe Thread. This is a type of threading that is found on the inside lip of a fitting, allowing connection to a MPT or male pipe threaded end. FPT/FIPT threading is commonly used for PVC and CPVC piping systems.What does FNFN mean?
This page is all about the meaning, abbreviation and acronym of FNFN explaining the definition or meaning and giving useful information of similar terms. FNFN Stands For : Franklin Financial Corporation of Franklin.