Metric
| THREAD SIZE |
DRILL
(mm) |
THREAD
SIZE |
DRILL
(mm) |
| M1x0.25 |
0.75 |
M5x0.5 |
4.5 |
| M1.2x0.25 |
0.95 |
M5x0.75 |
4.25 |
| M1.4x0.3 |
1.1 |
M5x0.8 |
4.2 |
| M1.6x0.35 |
1.25 |
M6x0.5 |
5.5 |
| M1.8x0.35 |
1.45 |
M6x0.75 |
5.25 |
| M2x0.4 |
1.6 |
M6x1 |
5 |
| M2.2x0.45 |
1.75 |
M7x0.5 |
6.5 |
| M2.5x0.45 |
2.05 |
M7x0.75 |
6.25 |
| M2.6x0.45 |
2.15 |
M7x1 |
6 |
| M3x0.35 |
2.65 |
M8x0.5 |
7.5 |
| M3x0.5 |
2.5 |
M8x0.75 |
7.25 |
| M3.5x0.35 |
3.15 |
M8x1 |
7 |
| M3.5x0.6 |
2.9 |
M8x1.25 |
6.8 |
| M4x0.5 |
3.5 |
|
|
| M4x0.7 |
3.3 |
|
|
| M4.5x0.5 |
4 |
|
|
UNC/UNF
| UNC
|
DRILL
(mm) |
UNF
|
DRILL
(mm) |
| 1.64 |
1.55 |
0.80 |
1.25 |
| 2.56 |
1.8 |
1.72 |
1.55 |
| 3.48 |
2.1 |
2.64 |
1.85 |
| 4.40 |
2.3 |
3.56 |
2.1 |
| 5.40 |
2.6 |
4.48 |
2.4 |
| 6.32 |
2.8 |
5.44 |
2.7 |
| 8.32 |
3.4 |
6.40 |
2.9 |
| 10.24 |
3.9 |
8.36 |
3.5 |
| 12.24 |
4.5 |
10.32 |
4.1 |
| 1/4.20 |
5.1 |
12.28 |
4.6 |
| 5/16.18 |
6.6 |
1/4.28 |
5.5 |
| 3/8.16 |
8 |
5/16.24 |
6.9 |
| 7/16.14 |
9.4 |
3/8.24 |
8.5 |
| 1/2.13 |
10.8 |
7/16.20 |
9.9 |
| |
|
1/2.20 |
11.5 |
BA
| THREAD |
DRILL
(mm) |
| 0 |
5 |
| 1 |
4.4 |
| 2 |
3.9 |
| 3 |
3.4 |
| 4 |
2.95 |
| 5 |
2.6 |
| 6 |
2.25 |
| 7 |
2 |
| 8 |
1.75 |
| 9 |
1.5 |
| 10 |
1.35 |