3/4 NPT thread dimensions
ASME B1.20.1 · Taper 1:16 · 60°
Dimensions
- Standard
- ASME B1.20.1
- Form
- Taper 1:16
- Major diameter
- 26.670 mm
- Threads per inch
- 14
- Pitch
- 1.814 mm
- Flank angle
- 60°
- Seals on
- Thread + sealant
- Used for
- Process connections and cable entries
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 |
|---|---|---|---|---|
| G 3/4 | ISO 228-1 (BSPP) | 0.23 mm smaller in diameter; same pitch | 55° | Gasket / O-ring |
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