DRILL DIAMETERS FOR THREAD RECOMMENDATION TABLES
ISO UNIFIED COARSE INSERT THREAD
TAP EG UNC |
DRILL Diameter mm |
Ex1 |
Ex2 |
nr 2-56 |
2.3 |
0 |
0 |
nr 3-48 |
2.7 |
0 |
0 |
nr 4-40 |
3 |
0 |
0 |
nr 5-40 |
3.4 |
0 |
0 |
nr 6-32 |
3.7 |
0 |
0 |
nr 8.32 |
4.4 |
0 |
0 |
nr 10-24 |
5.1 |
0 |
0 |
nr 12-24 |
5.8 |
0 |
0 |
1/4-20 |
6.7 |
0 |
0 |
5/16-18 |
8.4 |
0 |
0 |
3/8-16 |
10 |
0 |
0 |
7/16-14 |
11.7 |
0 |
0 |
1/2-13 |
13.3 |
0 |
0 | |