英制粗牙BSW | 牙數 | 下料孔徑 |
1/8 | 40 | 2.6 |
5/32 | 32 | 3.1 |
3/16 | 24 | 3.6 |
1/4 | 20 | 5.1 |
5/16 | 18 | 6.5 |
3/8 | 16 | 7.9 |
7/16 | 14 | 9.3 |
1/2 | 12 | 10.5 |
9/16 | 12 | 12 |
5/8 | 11 | 13.5 |
11/16 | 11 | 15 |
3/4 | 10 | 16.5 |
7/8 | 9 | 19.25 |
1” | 8 | 22 |
1-1/8 | 7 | 24.75 |
1-1/4 | 7 | 28 |
1-3/8 | 6 | 30.5 |
1-1/2 | 6 | 33.5 |
1-3/4 | 5 | 39 |
2” | 4.5 | 44.5 |
2-1/4 | 4 | 50 |
2-1/2 | 4 | 56.5 |
