Somta - page 70

60
BSP
Nominal
Diameter
Tapping
Drill Size (mm) TPI
1/8
1/4
3/8
1/2
5/8
3/4
7/8
1"
1-1/4
1-1/2
1-3/4
2"
28
19
19
14
14
14
14
11
11
11
11
11
8.8
11.8
15.5
19
21
24.5
28.5
31
40
45.5
51.5
57
BSPT
1/8
1/4
3/8
1/2
3/4
1"
1-1/4
1-1/2
2"
28
19
19
14
14
11
11
11
11
8.6
11.5
15.0
18.5
24.0
30.25
39.0
45.0
56.5
NPS
1/8
1/4
3/8
1/2
3/4
1"
1-1/4
1-1/2
2"
27
18
18
14
14
11-1/2
11-1/2
11-1/2
11-1/2
9.1
12.0
15.5
19.0
24.5
30.5
39.4
45.5
57.5