M64×4 thread: 64 × 4 mm
Threads › M64×4
M64×4 is an ISO metric fine thread: 64 mm major diameter, 4 mm pitch, 60° form.
| Standard | ISO metric fine |
|---|---|
| Major diameter | 64 mm |
| Pitch | 4 mm |
| Thread angle | 60° |
| Minor diameter, bolt | 59.09 mm |
| Minor diameter, nut | 59.67 mm |
| Tap drill | Not listed. Check your tap maker's chart. |
| Usual class | 6g bolt, 6H nut |
Minor diameters worked out from the basic profile: major Ø − 1.22687 × pitch (bolt) and − 1.08253 × pitch (nut).
Open M64×4 in BenchsmithAdd to order list
What the call-out means
M | ISO metric |
64 | Major diameter, mm |
× 4 | Pitch, mm. Given because it is a fine pitch |
-6g | Bolt tolerance class (usual) |
-6H | Nut tolerance class (usual) |
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
- M646 mm pitch
One size up or down
- M60×4Ø60 mm (down)
Got a bolt and no idea what it is? Measure the outside Ø and type it into Benchsmith → Find → Thread.