Tr8×1.5 thread: 8 × 1.5 mm
Threads › Tr8×1.5
Tr8×1.5 is a Trapezoidal (Tr) thread: 8 mm major diameter, 1.5 mm pitch, 30° form.
| Standard | Trapezoidal (Tr) |
|---|---|
| Major diameter | 8 mm |
| Pitch | 1.5 mm |
| Thread angle | 30° |
| Minor diameter, bolt | 6 mm |
| Minor diameter, nut | 6.5 mm |
| Tap drill | Not listed. Check your tap maker's chart. |
| Usual class | 7e bolt, 7H nut |
Minor diameters worked out from the basic profile: major Ø − pitch − 0.5 mm (bolt) and major Ø − pitch (nut).
Open Tr8×1.5 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
- M8Ø8 mm, 1.25 mm pitch
- M8×1Ø8 mm, 1 mm pitch
- 5/16-18 UNCØ7.94 mm, 18 TPI
- 5/16-24 UNFØ7.94 mm, 24 TPI
- 5/16 BSWØ7.94 mm, 18 TPI
- 5/16-14 ACMEØ7.94 mm, 14 TPI
One size up or down
- Tr10×2Ø10 mm (up)
Got a bolt and no idea what it is? Measure the outside Ø and type it into Benchsmith → Find → Thread.