Home Pipe Threads 5" NPT

5" NPT Thread Specifications

Complete dimensions for 5" NPT pipe thread. TPI: 8, Pitch: 0.125" (3.175 mm).

Thread Dimensions

Designation5" NPT
Nominal Pipe Size5"
TPI8
Pitch0.125" (3.175 mm)
Outside Diameter5.563" (141.3 mm)
Pitch Diameter5.4818" (139.24 mm)
Minor Diameter5.4096" (137.41 mm)
Taper Angle1.7899° (1:16 taper ratio)
Thread Depth0.0866" (2.2 mm)

Tap Drill Size

Tap drill: 5.4096" (137.4 mm)

Common Applications