Machining
Metric thread handbook online
Quick access to thread pitch, tap drill diameter and cutting depth. Suitable for lathe and mill thread operations.
Thread reference
Metric M3–M40 (coarse and fine pitch), G and NPT/K. Calculated per ISO 286 / DSTU.
Thread profile · shaft
60° · M · external
| Parameter | Symbol | Value |
|---|---|---|
| Nominal | d | M10 × 1.5 mm |
| Pitch | P | 1.5000 mm |
| Major diameter | d | 10.0000 mm |
| Pitch diameter | d₂ | 9.0257 mm |
| Root diameter | d₁ | 8.3762 mm |
| Profile height | H | 1.2990 mm |
Frequently asked questions
What tap drill diameter for metric M threads?
For blind holes drill ≈ D − pitch. For through holes slightly smaller. The handbook shows a typical value for the selected pitch.
How does M differ from G thread?
M is metric triangular-profile thread (most common in machinery). G is parallel pipe thread with a truncated profile for sealed joints.