Editing National pipe thread (section)

{{Short description|U.S. national technical standards for threads on pipes and pipe fittings}}
[[File:Malefemalepipe.jpg|thumb|Threaded pipe and [[Piping and plumbing fittings#Elbow|elbow]]. The pipe has a [[Gender of connectors and fasteners|male]] NPT thread, while the elbow is [[Gender of connectors and fasteners|female]].]]
'''American National Standard Pipe Thread''' standards, often called '''national pipe thread''' standards for short, are United States national [[technical standard]]s for [[screw thread]]s used on [[threaded pipe]]s and [[Piping and plumbing fitting|pipe fitting]]s. They include both [[screw thread#Taper|tapered]] and straight thread series for various purposes, including rigidity, [[pressure]]-tight sealing, or both.{{sfnp|Machinery's Handbook|1996|pages=1772–1781}} The types are named with a full name and an abbreviation, such as '''NPT''', '''NPS''', '''NPTF''', or '''NPSC'''.

'''MIP''' is an abbreviation for male iron pipe, and '''FIP''' is an abbreviation for female iron pipe.<ref>{{cite book | last = Cauldwell | first = Rex | title = Plumbing | publisher = Taunton Press | location = Newtown, CT | year = 2006 | isbn = 1561588172 }}
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Outside North America, some US pipe thread sizes are widely used, as well as many [[British Standard Pipe]] threads and [[International Organization for Standardization|ISO]] 7–1, 7–2, 228–1, and 228-2 threads.