1/2 NPT thread dimensions

Standard

ASME B1.20.1

Form

Taper 1:16

Major diameter

21.336 mm

Threads per inch

14

Pitch

1.814 mm

Flank angle

60°

Seals on

Thread + sealant

Used for

Process connections and cable entries

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