To tap an M4 thread (pitch 0.7 mm), drill a 3.3 mm hole for standard 6H tolerance. Use 3.4 mm for a looser 7H fit. M4 taps are common in enclosures, control panels and small brackets.
| Tolerance class | Drill diameter | Pitch | Thread depth |
|---|---|---|---|
| 6H (standard) | 3.3 mm | 0.7 mm | 5–8 mm |
| 7H (loose) | 3.4 mm | 0.7 mm | 5–8 mm |
| 4H (tight) | 3.2 mm | 0.7 mm | 5–8 mm |
Fine pitch M4×0.5 variant available in Handbook Locksmith app.
FAQ
3.3 mm drill for standard M4 thread (6H, pitch 0.7 mm).
Full M4 thread data in the app
Profile viewer, tolerance calculator, 28 thread types
GET IT ONGoogle PlayProfile viewer, tolerance calculator, 28 thread types
← Metric threads | See also: M3 · M5 · M6 · M8 · M10 · M12 · M16 · M20 · Spindle speed calculator