Somta - page 67

57
Metric Fine (cont)
Size
Tapping
Drill Size (mm) Pitch
39
40
42
45
48
50
52
1.5
1.5
1.5
1.5
1.5
1.5
1.5
37.5
38.5
40.5
43.5
46.5
48.5
50.5
BSW
Nominal
Diameter
Tapping
Drill Size (mm) TPI
3/32
1/8
5/32
3/16
7/32
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
1-1/2
1-3/4
2"
48
40
32
24
24
20
18
16
14
12
12
11
10
9
8
7
7
6
5
4-1/2
1.9
2.55
3.2
3.7
4.5
5.1
6.5
8
9.3
10.5
12.2
13.5
16.5
19.5
22
25
28
34
39
45
BSF
3/16
7/32
1/4
5/16
32
28
26
22
4
4.7
5.4
6.8