1/8" NPT Thread Specifications
Complete dimensions for 1/8" NPT pipe thread. TPI: 27, Pitch: 0.03704" (0.941 mm).
Thread Dimensions
| Designation | 1/8" NPT |
| Nominal Pipe Size | 1/8" |
| TPI | 27 |
| Pitch | 0.03704" (0.941 mm) |
| Outside Diameter | 0.405" (10.29 mm) |
| Pitch Diameter | 0.3809" (9.68 mm) |
| Minor Diameter | 0.3596" (9.13 mm) |
| Taper Angle | 1.7899° (1:16 taper ratio) |
| Thread Depth | 0.02566" (0.652 mm) |
Tap Drill Size
Tap drill: 0.3596" (9.13 mm)
Common Applications
- Plumbing connections
- Gas piping
- Hydraulic fittings
- Pneumatic connections