3/4-6 ACME thread: 19.05 mm × 6 TPI
Threads › 3/4-6 ACME
3/4-6 ACME is an Acme thread: 19.05 mm major diameter, 6 TPI (4.233 mm pitch), 29° form.
| Standard | Acme |
|---|---|
| Major diameter | 19.05 mm (0.75″) |
| Pitch | 6 TPI (4.233 mm) |
| Thread angle | 29° |
| Minor diameter, bolt | 14.31 mm |
| Minor diameter, nut | 14.31 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 3/4-6 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
- 3/4-10 UNCØ19.05 mm, 10 TPI
- 3/4-16 UNFØ19.05 mm, 16 TPI
- 3/4 BSWØ19.05 mm, 10 TPI
- M20Ø20 mm, 2.5 mm pitch
- M20×1.5Ø20 mm, 1.5 mm pitch
- M20×2Ø20 mm, 2 mm pitch
One size up or down
- 5/8-8 ACMEØ15.88 mm (down)
- 7/8-6 ACMEØ22.23 mm (up)
Got a bolt and no idea what it is? Measure the outside Ø and type it into Benchsmith → Find → Thread.