M4 Screw Size and Thread Pitch
M4 = 4.0 mm outer diameter, 0.7 mm coarse pitch, 3.3 mm tap drill, 3 mm hex key. Torque ≈ 3.0 N·m (8.8 steel).
Open the interactive Standards & Sizes tool →Key facts
| Outer diameter | 4.0 mm |
|---|---|
| Pitch (coarse) | 0.7 mm |
| Tap drill | 3.3 mm |
| Socket head A/F | 3 mm |
| Tightening torque | 3.0 N·m (8.8) |
Frequently asked questions
What is the pitch of an M4 screw?
The standard coarse pitch for M4 is 0.7 mm; outer diameter is 4.0 mm.
What tap drill is needed for M4?
Use a 3.3 mm drill for an M4 tapped hole (coarse, ISO 261).
Related pages
M4 Screw is part of Standards & Sizes on GOAT Lab — a free reference you can use without signing up, and it works offline. Open the tool above for any custom value.
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