NPSC, Staright Pipe Thread - Machining Doctor

NPSC Internal Straight (parallel) Pipe Threads are used to manufacture pressure-tight fittings when assembled with an NPT external taper thread.
Simple explnation for: Pitch Diameter, Major Diameter, Minor Diameter, pitch, lead, lead angle, Length of Engagement, crest, root, thread height, over-wire, and allowance.

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