| BRITISH
STD |
||
| BSCy (60o) |
||
| Sizes in inches |
TPI |
Drill |
| 1/8 |
40 |
2.65 |
| 5/32 |
32 |
3.3 |
| 3/16 |
32 |
4.1 |
| 1/4 |
26 |
5.6 |
| 5/16 |
26 |
7.2 |
|
3/8 |
26 |
8.7 |
| 7/16 |
26 |
10.3 |
| 1/2 |
26 |
11.9 |
| 9/16 |
20 |
13.1 |
| 9/16 |
26 |
13.5 |
| 5/8 |
20 |
14.5 |
| 5/8 |
26 |
15.0 |
| 3/4 |
20 |
17.8 |
| 3/4 |
26 |
18.2 |