1-5 ACME thread: 25.4 mm × 5 TPI
Threads › 1-5 ACME
1-5 ACME is an Acme thread: 25.4 mm major diameter, 5 TPI (5.08 mm pitch), 29° form.
| Standard | Acme |
|---|---|
| Major diameter | 25.4 mm (1″) |
| Pitch | 5 TPI (5.08 mm) |
| Thread angle | 29° |
| Minor diameter, bolt | 19.81 mm |
| Minor diameter, nut | 19.81 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 1-5 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
One size up or down
- 7/8-6 ACMEØ22.23 mm (down)
- 1-1/4-5 ACMEØ31.75 mm (up)
Got a bolt and no idea what it is? Measure the outside Ø and type it into Benchsmith → Find → Thread.