Home Pipe Threads 6" NPT

6" NPT Thread Specifications

Complete dimensions for 6" NPT pipe thread. TPI: 8, Pitch: 0.125" (3.175 mm).

Thread Dimensions

Designation6" NPT
Nominal Pipe Size6"
TPI8
Pitch0.125" (3.175 mm)
Outside Diameter6.625" (168.28 mm)
Pitch Diameter6.5438" (166.21 mm)
Minor Diameter6.4716" (164.38 mm)
Taper Angle1.7899° (1:16 taper ratio)
Thread Depth0.0866" (2.2 mm)

Tap Drill Size

Tap drill: 6.4716" (164.38 mm)

Common Applications