3/4-14 NPT thread: 26.67 mm × 14 TPI
Threads › 3/4-14 NPT
3/4-14 NPT is an NPT taper thread: 26.67 mm pipe OD, 14 TPI (1.814 mm pitch), 60° form. Tap drill 23.4 mm. Taper thread: the Ø changes along the length, measure near the start.
| Standard | NPT taper |
|---|---|
| Pipe OD | 26.67 mm (1.05″) |
| Pitch | 14 TPI (1.814 mm) |
| Thread angle | 60° |
| Tap drill | 23.4 mm |
Open 3/4-14 NPT in BenchsmithAdd to order list
Measure it
Bolt: Measure across the crests of the bolt with the caliper jaws. Worn bolts read 0.1 to 0.3 under.
Nut or tapped hole: Measure across the tops of the threads inside the nut or hole with the inside jaws. That is the minor Ø. Worn or oversize holes read a little over.
Close in size, won't mate
- G3/4Ø26.44 mm, 14 TPI
- R3/4Ø26.44 mm, 14 TPI
- M27Ø27 mm, 3 mm pitch
- M27×2Ø27 mm, 2 mm pitch
- Tr26×5Ø26 mm, 5 mm pitch
One size up or down
- 1/2-14 NPTØ21.34 mm (down)
- 1-11.5 NPTØ33.4 mm (up)
Got a bolt and no idea what it is? Measure the outside Ø and type it into Benchsmith → Find → Thread.