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METRIC THREAD - Drill & Tap Chart (ISO)
Fine Thread Sizes
| Tap (Thread) Size | Drill Size(mm) |
|---|---|
| M4 x 0.35 | 3.60 |
| M4 x 0.5 | 3.50 |
| M5 x 0.5 | 4.50 |
| M6 x .5 | 5.50 |
| M6 x .75 | 5.25 |
| M7 x .75 | 6.25 |
| M8 x .5 | 7.00 |
| M8 x .75 | 7.25 |
| M8 x 1 | 7.50 |
| M9 x 1 | 8.00 |
| M10 x 0.75 | 9.25 |
| M10 x 1 | 9.0 |
| M10 x 1.25 | 8.8 |
| M11 x 1 | 10.0 |
| M12 x .75 | 11.25 |
| M12 x 1 | 11.0 |
| M12 x 1.5 | 10.5 |
| M14 x 1 | 13.0 |
| M14 x 1.25 | 12.8 |
| M14 x 1.5 | 12.5 |
| M16 x 1 | 15.0 |
| M16 x 1.5 | 15.0 |
| M18 x 1 | 17.0 |
| M18 x 2 | 16.0 |
| M20 x 1 | 19.0 |
| M20 x 1.5 | 18.5 |
| M20 x 2 | 18.0 |
| M22 x 1 | 21.0 |
| M22 x 1.5 | 20.5 |
| M22 x 2 | 20.0 |
| M24 x 1.5 | 22.5 |
| M24 x 2 | 22.0 |
| M26 x 1.5 | 24.5 |
| M27 x 1.5 | 25.5 |
| M27 x 2 | 25.0 |
| M28 x 1.5 | 26.5 |
| M30 x 1.5 | 28.5 |
| M30 x 2 | 28.0 |
| M33 x 2 | 31.0 |
| M36 x 3 | 36.0 |
Course Thread Sizes
| Tap (Thread) Size | Drill Size(mm) |
|---|---|
| M1 x 0.25 | 0.75 |
| M1.1 x 0.25 | 0.85 |
| M1.2 x 0.25 | 0.95 |
| M1.4 x 0.3 | 1.10 |
| M1.6 x 0.35 | 1.25 |
| M1.8 x 0.35 | 1.45 |
| M2 x 0.4 | 1.60 |
| M2.2 x 0.45 | 1.75 |
| M2.5 x 0.45 | 2.05 |
| M3 x 0.5 | 2.50 |
| M3.5 x 0.6 | 2.90 |
| M4 x 0.7 | 3.30 |
| M4.5 x 0.75 | 3.70 |
| M5 x 0.8 | 4.20 |
| M6 x 1 | 5.00 |
| M7 x 1 | 6.00 |
| M8 x 1.25 | 6.80 |
| M9 x 1.25 | 7.80 |
| M10 x 1.5 | 8.50 |
| M11 x 1.5 | 9.50 |
| M12 x 1.75 | 10.20 |
| M14 x 2 | 12.00 |
| M16 x 2 | 14.00 |
| M18 x 2.5 | 15.50 |
| M20 x 2.5 | 17.50 |
| M22 x 2.5 | 19.50 |
| M24 x 3 | 21.00 |
| M27 x 3 | 24.00 |
| M30 x 3.5 | 26.50 |
| M33 x 3.5 | 29.50 |
| M36 x 4 | 32.00 |
| M39 x 4 | 35.00 |
| M42 x 4.5 | 37.50 |
| M45 x 4.5 | 40.50 |
| M48 x 5 | 43.00 |
| M52 x 5 | 47.00 |
| M56 x 5.5 | 50.50 |
| M60 x 5.5 | 54.50 |
| M64 x 6 | 58.00 |
| M68 x 6 | 62.00 |
Tap (Thread) Size - Nominal Dia x Pitch [p] in mm