7/16-20 UNF thread: 11.11 mm × 20 TPI
Threads › 7/16-20 UNF
7/16-20 UNF is a UNF thread: 11.11 mm major diameter, 20 TPI (1.27 mm pitch), 60° form.
| Standard | UNF |
|---|---|
| Major diameter | 11.112 mm (0.438″) |
| Pitch | 20 TPI (1.27 mm) |
| Thread angle | 60° |
| Minor diameter, bolt | 9.55 mm |
| Minor diameter, nut | 9.74 mm |
| Tap drill | Not listed. Check your tap maker's chart. |
| Usual class | 2A bolt, 2B nut |
Minor diameters worked out from the basic profile: major Ø − 1.22687 × pitch (bolt) and − 1.08253 × pitch (nut).
Open 7/16-20 UNF 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.
Same diameter, other pitch
- 7/16-14 UNC14 TPI (1.814 mm pitch)
- 7/16 BSW14 TPI (1.814 mm pitch)
Close in size, won't mate
- 7/16-12 ACMEØ11.11 mm, 12 TPI
- 1/8-27 NPTØ10.29 mm, 27 TPI
- M12Ø12 mm, 1.75 mm pitch
- M12×1.5Ø12 mm, 1.5 mm pitch
- M12×1.25Ø12 mm, 1.25 mm pitch
- Tr12×3Ø12 mm, 3 mm pitch
One size up or down
- 3/8-24 UNFØ9.52 mm (down)
- 1/2-20 UNFØ12.7 mm (up)
Got a bolt and no idea what it is? Measure the outside Ø and type it into Benchsmith → Find → Thread.