9/16 BSW thread: 14.29 mm × 12 TPI
Threads › 9/16 BSW
9/16 BSW is a BSW Whitworth thread: 14.29 mm major diameter, 12 TPI (2.117 mm pitch), 55° form.
| Standard | BSW Whitworth |
|---|---|
| Major diameter | 14.288 mm (0.563″) |
| Pitch | 12 TPI (2.117 mm) |
| Thread angle | 55° |
| Minor diameter, bolt | 11.58 mm |
| Minor diameter, nut | 11.58 mm |
| Tap drill | Not listed. Check your tap maker's chart. |
Minor diameters worked out from the basic profile: major Ø − 1.28065 × pitch.
Open 9/16 BSW 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
- 9/16-12 UNC12 TPI (2.117 mm pitch)
- 9/16-18 UNF18 TPI (1.411 mm pitch)
Close in size, won't mate
- M14Ø14 mm, 2 mm pitch
- M14×1.5Ø14 mm, 1.5 mm pitch
- Tr14×3Ø14 mm, 3 mm pitch
- 1/4-18 NPTØ13.72 mm, 18 TPI
One size up or down
Got a bolt and no idea what it is? Measure the outside Ø and type it into Benchsmith → Find → Thread.