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1 NPT thread dimensions

ASME B1.20.1 · Taper 1:16 · 60°

Dimensions

Standard
ASME B1.20.1
Form
Taper 1:16
Major diameter
33.401 mm
Threads per inch
11.5
Pitch
2.209 mm
Flank angle
60°
Seals on
Thread + sealant
Used for
Process connections

For taper threads the diameter is the nominal pipe outside diameter used for identification; the thread diameter changes along the length at a taper of 1:16.

Check a measurement against this thread

Easily confused with

No other thread in the reference table has a pitch within 4 % and a diameter within 1.5 mm of this one.

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