Metric Tapping Information
This page contains information regarding tap and clearance drills for metric machine screws including the decimal equivalents from 1 mm to mm (~1.2 inch).
| Screw Size | Tap Drill | Clearance Drill | ||||||
|---|---|---|---|---|---|---|---|---|
| Nom. Dia. (mm) | Pitch (mm) | Series | Drill Size (65-75% thread) (mm) |
Dec. Equiv. (inch) | Close Fit | Free Fit | ||
| Drill Size (mm) | Dec. Equiv. (inch) | Drill Size (mm) | Decimal Equiv. (inch) | |||||
| 1 | 0.20 | Fine | 0.80 | 0.0315 | 1.05 | 0.0413 | 1.20 | 0.0472 |
| 0.25 | Coarse | 0.75 | 0.0295 | |||||
| 1.1 | 0.20 | Fine | 0.90 | 0.0354 | 1.15 | 0.0453 | 1.30 | 0.0512 |
| 0.25 | Coarse | 0.85 | 0.0335 | |||||
| 1.2 | 0.20 | Fine | 1.00 | 0.0394 | 1.30 | 0.0512 | 1.50 | 0.0590 |
| 0.25 | Coarse | 0.95 | 0.0374 | |||||
| 1.4 | 0.20 | Fine | 1.20 | 0.0472 | 1.50 | 0.0591 | 1.70 | 0.0669 |
| 0.30 | Coarse | 1.10 | 0.0433 | |||||
| 1.6 | 0.20 | Fine | 1.40 | 0.0551 | 1.70 | 0.0669 | 2.00 | 0.0787 |
| 0.35 | Coarse | 1.25 | 0.0492 | |||||
| 1.8 | 0.20 | Fine | 1.60 | 0.0630 | 1.90 | 0.0748 | 2.20 | 0.0866 |
| 0.35 | Coarse | 1.45 | 0.0571 | |||||
| 2 | 0.25 | Fine | 1.75 | 0.0689 | 2.20 | 0.0866 | 2.60 | 0.1024 |
| 0.40 | Coarse | 1.60 | 0.0630 | |||||
| 2.2 | 0.25 | Fine | 1.95 | 0.0768 | 2.40 | 0.0945 | 2.80 | 0.1102 |
| 0.45 | Coarse | 1.75 | 0.0689 | |||||
| 2.5 | 0.35 | Fine | 2.15 | 0.0846 | 2.70 | 0.1063 | 3.10 | 0.1220 |
| 0.45 | Coarse | 2.05 | 0.0807 | |||||
| 3 | 0.35 | Fine | 2.65 | 0.1043 | 3.20 | 0.1260 | 3.60 | 0.1417 |
| 0.50 | Coarse | 2.50 | 0.0984 | |||||
| 3.5 | 0.35 | Fine | 3.15 | 0.1240 | 3.70 | 0.1457 | 4.20 | 0.1653 |
| 0.60 | Coarse | 2.90 | 0.1142 | |||||
| 4 | 0.50 | Fine | 3.50 | 0.1378 | 4.30 | 0.1693 | 4.80 | 0.1890 |
| 0.70 | Coarse | 3.30 | 0.1299 | |||||
| 4.5 | 0.50 | Fine | 4.00 | 0.1575 | 4.80 | 0.1890 | 5.30 | 0.2087 |
| 0.75 | Coarse | 3.70 | 0.1457 | |||||
| 5 | 0.50 | Fine | 4.50 | 0.1772 | 5.30 | 0.2087 | 5.80 | 0.2283 |
| 0.80 | Coarse | 4.20 | 0.1654 | |||||
| 6 | 0.75 | Fine | 5.25 | 0.2067 | 6.40 | 0.2520 | 7.00 | 0.2756 |
| 1.00 | Coarse | 5.00 | 0.1969 | |||||
| 7 | 0.75 | Fine | 6.25 | 0.2461 | 7.40 | 0.2913 | 8.00 | 0.3150 |
| 1.00 | Coarse | 6.00 | 0.2362 | |||||
| 8 | 0.75 | Fine | 7.25 | 0.2854 | 8.40 | 0.3307 | 10.00 | 0.3937 |
| 1.00 | Fine | 7.50 | 0.2953 | |||||
| 1.25 | Coarse | 6.80 | 0.2677 | |||||
| 9 | 0.75 | Fine | 8.25 | 0.3248 | 9.50 | 0.3740 | 10.50 | 0.4134 |
| 1.00 | Fine | 8.00 | 0.3150 | |||||
| 1.25 | Coarse | 7.80 | 0.3071 | |||||
| 10 | 0.75 | Fine | 9.25 | 0.3642 | 10.50 | 0.4134 | 12.00 | 0.4724 |
| 1.00 | Fine | 9.00 | 0.3543 | |||||
| 1.25 | Fine | 8.80 | 0.3465 | |||||
| 1.50 | Coarse | 8.50 | 0.3346 | |||||
| 11 | 0.75 | Fine | 10.25 | 0.4035 | 12.00 | 0.4724 | 13.00 | 0.5118 |
| 1.00 | Fine | 10.00 | 0.3937 | |||||
| 1.50 | Coarse | 9.50 | 0.3740 | |||||
| 12 | 1.00 | Fine | 11.00 | 0.4331 | 13.00 | 0.5118 | 15.00 | 0.5905 |
| 1.25 | Fine | 10.75 | 0.4232 | |||||
| 1.50 | Fine | 10.50 | 0.4134 | |||||
| 1.75 | Coarse | 10.20 | 0.4016 | |||||
| 14 | 1.00 | Fine | 13.00 | 0.5118 | 15.00 | 0.5905 | 17.00 | .6693 |
| 1.25 | Fine | 12.80 | 0.5039 | |||||
| 1.50 | Fine | 12.50 | 0.4921 | |||||
| 2.00 | Coarse | 12.00 | 0.4724 | |||||
| 15 | 1.00 | Fine | 14.00 | 0.5512 | 16.00 | 0.6299 | 18.00 | 0.7087 |
| 1.50 | Fine | 13.50 | 0.5315 | |||||
| 16 | 1.00 | Fine | 15.00 | 0.5906 | 17.00 | 0.6693 | 19.00 | 0.7480 |
| 1.50 | Fine | 14.50 | 0.5709 | |||||
| 2.00 | Coarse | 14.00 | 0.5512 | |||||
| 17 | 1.00 | Fine | 16.00 | 0.6299 | 18.00 | 0.7087 | 20.00 | 0.7874 |
| 1.50 | Fine | 15.50 | 0.6103 | |||||
| 18 | 1.00 | Fine | 17.00 | 0.6693 | 19.00 | 0.7480 | 21.00 | 0.8268 |
| 1.50 | Fine | 16.50 | 0.6496 | |||||
| 2.00 | Fine | 16.00 | 0.6299 | |||||
| 2.50 | Coarse | 15.50 | 0.6102 | |||||
| 20 | 1.00 | Fine | 19.00 | 0.7480 | 21.00 | 0.8268 | 24.00 | 0.9449 |
| 1.50 | Fine | 18.50 | 0.7283 | |||||
| 2.00 | Fine | 18.00 | 0.7087 | |||||
| 2.50 | Coarse | 17.50 | 0.6890 | |||||
| 30 | 1.00 | Fine | 29.00 | 1.1417 | 31.00 | 1.2205 | 35.00 | 1.3779 |
| 1.50 | Fine | 28.50 | 1.1220 | |||||
| 2.00 | Fine | 28.00 | 1.1024 | |||||
| 3.00 | Fine | 27.00 | 1.0630 | |||||
| 3.50 | Coarse | 26.50 | 1.0433 | |||||
| Nom. Dia. (mm) | Pitch (mm) | Series | Drill Size (65-75% thread) (mm) |
Dec. Equiv. (inch) | Drill Size (mm) | Dec. Equiv. (inch) | Drill Size (mm) | Dec. Equiv. (inch) |
| Close Fit | Free Fit | |||||||
| Screw Size | Tapping Drill | Clearance Drill | ||||||
