Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym NPSM is...

NPSM is

  • National Pipe Straight Mechanical thread

NPSM is also in:

Acronym Definition Searched: APA UKK 2LT ACDA GAG ZLE VNCNUS OFPA NOLA WSIB 41502 WEA AFK SSCT OAH