Home Pipe Threads 1/2" NPT

1/2" NPT Thread Specifications

Complete dimensions for 1/2" NPT pipe thread. TPI: 14, Pitch: 0.07143" (1.814 mm).

Thread Dimensions

Designation1/2" NPT
Nominal Pipe Size1/2"
TPI14
Pitch0.07143" (1.814 mm)
Outside Diameter0.84" (21.34 mm)
Pitch Diameter0.7936" (20.16 mm)
Minor Diameter0.7524" (19.11 mm)
Taper Angle1.7899° (1:16 taper ratio)
Thread Depth0.04949" (1.257 mm)

Tap Drill Size

Tap drill: 0.7524" (19.11 mm)

Common Applications