Somta - page 68

58
BSF
Nominal
Diameter
Tapping
Drill Size (mm) TPI
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1"
1-1/8
1-1/4
1-1/2
20
18
16
16
14
12
11
10
9
9
8
8.3
9.8
11
12.7
14
16.5
19.5
22.5
25.5
29
34.5
UNC
No.3
No.4
No.5
No.6
No.8
No.10
No.12
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1"
1-1/8
1-1/4
1-3/8
1-1/2
1-3/4
2"
48
40
40
32
32
24
24
20
18
16
14
13
12
11
10
9
8
7
7
6
6
5
4-1/2
2
2.25
2.6
2.75
3.4
3.8
4.4
5.1
6.6
8
9.4
10.8
12.2
13.5
16.5
19.5
22
25
28
31
34
39
45