Metric Tap Drill Sizes
| Metric Tap__
|
Tap Drill mm
|
Dec. Equiv in. |
| M1.6 x 0.35 |
1.25 |
.0492 |
| M1.8 x 0.35 |
1.45 |
.0571 |
| M2 x 0.4 |
1.60 |
.0630 |
| M2.2 x 0.45 |
1.75 |
.0689 |
| M2.5 x 0.45 |
2.05 |
.0807 |
| M3 x 0.5 |
2.50 |
.0984 |
| M3.5 x 0.6 |
2.90 |
.1142 |
| M4 x 0.7 |
3.30 |
.1299 |
| M4.5 x 0.75 |
3.70 |
.1457 |
| M5 x 0.8 |
4.20 |
.1654 |
| M6 x 1 |
5.00 |
.1968 |
| M7 x 1 |
6.00 |
.2362 |
| M8 x 1.25 |
6.70 |
.2638 |
| M8 x 1 |
7.00 |
.2756 |
| M10 x 1.5 |
8.50 |
.3346 |
| M10 x 1.25 |
8.70 |
.3425 |
| M12 x 1.75 |
10.2 |
.4016 |
| M12 x 1.25 |
10.8 |
.4252 |
| M14 x 2 |
12.0 |
.4724 |
| M14 x 1.5 |
12.5 |
.4921 |
| M16 x 2 |
14.0 |
.5512 |
| M16 x 1.5 |
14.5 |
.5709 |
| M18 x 2.5 |
15.5 |
.6102 |
| M18 x 1.5 |
16.5 |
.6496 |
| M20 x 2.5 |
17.5 |
.6890 |
| M20 x 1.5 |
18.5 |
.7283 |
| M22 x 2.5 |
19.5 |
.7677 |
| M22 x 1.5 |
20.5 |
.8071 |
| M24 x 3 |
21.0 |
.8268 |
| M24 x 2 |
22.0 |
.8661 |
| M27 x 3 |
24.0 |
.9449 |
| M27 x 2 |
25.0 |
.9843 |
| M30 x 3.5 |
26.5 |
1.0433 |
| M30 x 2 |
28.0 |
1.1024 |
| M33 x 3.5 |
29.5 |
1.1614 |
| M33 x 2 |
31.0 |
1.2205 |
| M36 x 4 |
32.0 |
1.2598 |
| M36 x 3 |
33.0 |
1.2992 |
| M39 x 4 |
35.0 |
1.3780 |
| M39 x 3 |
36.0 |
1.4173 |
