1" NPT Thread Specifications
Complete dimensions for 1" NPT pipe thread. TPI: 11.5, Pitch: 0.08696" (2.209 mm).
Thread Dimensions
| Designation | 1" NPT |
| Nominal Pipe Size | 1" |
| TPI | 11.5 |
| Pitch | 0.08696" (2.209 mm) |
| Outside Diameter | 1.315" (33.4 mm) |
| Pitch Diameter | 1.2585" (31.97 mm) |
| Minor Diameter | 1.2083" (30.69 mm) |
| Taper Angle | 1.7899° (1:16 taper ratio) |
| Thread Depth | 0.06025" (1.53 mm) |
Tap Drill Size
Tap drill: 1.2083" (30.69 mm)
Common Applications
- Plumbing connections
- Gas piping
- Hydraulic fittings
- Pneumatic connections