5/8-8 ACME thread: 15.88 mm × 8 TPI
Threads › 5/8-8 ACME
5/8-8 ACME is an Acme thread: 15.88 mm major diameter, 8 TPI (3.175 mm pitch), 29° form.
| Standard | Acme |
|---|---|
| Major diameter | 15.875 mm (0.625″) |
| Pitch | 8 TPI (3.175 mm) |
| Thread angle | 29° |
| Minor diameter, bolt | 12.19 mm |
| Minor diameter, nut | 12.19 mm |
| Tap drill | Not listed. Check your tap maker's chart. |
Minor diameters worked out from the basic profile: major Ø − pitch − 0.508 mm.
Open 5/8-8 ACME 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
- 5/8-11 UNCØ15.88 mm, 11 TPI
- 5/8-18 UNFØ15.88 mm, 18 TPI
- 5/8 BSWØ15.88 mm, 11 TPI
- M16Ø16 mm, 2 mm pitch
- M16×1.5Ø16 mm, 1.5 mm pitch
- Tr16×4Ø16 mm, 4 mm pitch
One size up or down
- 1/2-10 ACMEØ12.7 mm (down)
- 3/4-6 ACMEØ19.05 mm (up)
Got a bolt and no idea what it is? Measure the outside Ø and type it into Benchsmith → Find → Thread.