1/4 NPT thread dimensions
ASME B1.20.1 · Taper 1:16 · 60°
Dimensions
- Standard
- ASME B1.20.1
- Form
- Taper 1:16
- Major diameter
- 13.716 mm
- Threads per inch
- 18
- Pitch
- 1.411 mm
- Flank angle
- 60°
- Seals on
- Thread + sealant
- Used for
- Process connections
For taper threads the diameter is the nominal pipe outside diameter used for identification; the thread diameter changes along the length at a taper of 1:16.
Easily confused with
| Thread | Standard | Major diameter | Flank | Seals on |
|---|---|---|---|---|
| 9/16-18 UNF | SAE J1926 (-6) | 0.57 mm larger in diameter; same pitch | 60° | O-ring boss |
| PG 9 | DIN 40430 | 1.48 mm larger in diameter; pitch 1.410 mm | 80° | Gland seal |
Need a sensor with a specific process connection or thread adapter?
Ask SensorSpan