Home Pipe Threads 1-1/2" NPT

1-1/2" NPT Thread Specifications

Complete dimensions for 1-1/2" NPT pipe thread. TPI: 11.5, Pitch: 0.08696" (2.209 mm).

Thread Dimensions

Designation1-1/2" NPT
Nominal Pipe Size1-1/2"
TPI11.5
Pitch0.08696" (2.209 mm)
Outside Diameter1.9" (48.26 mm)
Pitch Diameter1.8435" (46.83 mm)
Minor Diameter1.7933" (45.55 mm)
Taper Angle1.7899° (1:16 taper ratio)
Thread Depth0.06025" (1.53 mm)

Tap Drill Size

Tap drill: 1.7933" (45.55 mm)

Common Applications