Size

Nom.
15mm

1/2"
20mm

3/4"
25mm

1"
32mm

1-1/4"
40mm

1-1/2"
50mm

2"
65mm

2-1/2"
80mm

3"
100mm

4"

Thd./in
NPT
14
14
11.5
11.5
11.5
11.5
8
8
8

BSPT
14
14
11
11
11
11
11
11
11

JIS
d1
21.7
25.7
31.67
37.57
47.54
59.44
75.87
88.83
113.2

d2
22.3
26.3
32.33
38.43
48.46
60.56
76.6
89.6
114.7

I
22.2
25.4
28.6
31.8
34.9
38.1
44.45
47.63
84

BS
d1
21.3
26.7
33.5
42.2
48.2
60.3
75.1
88.8
114.1

d2
21.5
26.9
33.7
42.4
48.4
60.5
75.3
89.1
114.5

I
16.5
19.5
22.5
27
30
36
44.45
47.63
57.15

ANSI
d1
21.23
26.57
33.27
42.04
48.11
60.17
72.85
88.7
114.1

d2
21.54
26.87
33.65
42.42
48.56
60.63
73.38
89.31
114.8

I
22.22
25.4
28.58
31.75
34.93
38.1
44.45
47.63
57.15

DIN
d1
20.1
25.1
32.1
40.1
50.1
6