Best couplings under the standard production system Up to standard of BS 1740, JIS B 2302, ASTM A 120, DIN 2986 at your option and any type coupling is available on your drawing.

Steel Pipe Sockets
Standard : BS 1740-1971 BS 21 BS 1387-1985
Nominal diameter in inch
3/8"
1/2"
3/4"
1"
1.1/4"
1.1/2"
2"
2.1/2"
3"
4"
5"
6"
Nominal diameter in mm
10
15
20
25
32
40
50
65
80
100
125
150
Diameter in mm
22
27
32.5
39.5
49
56
68
84
98
124
151
178
Length in mm
28
37
39
46
51
51
60
69
75
87
96
96

American Standard
Merchant Coupling ASTM A 120
Nominal diameter in inch
1/2"
3/4"
1"
1.1/4"
1.1/2"
2"
2.1/2"
3"
3.1/2"
4"
5"
6"
Nominal diameter in mm
15
20
25
32
40
50
65
80
90
100
125
150
Diameter in mm
27.0
33.35
40.03
48.26
55.88
69.85
82.55
101.60
117.48
127.0
159.92
187.71
Length in mm
39.68
41.28
50.79
52.38
52.38
54.0
79.38
82.55
85.73
88.89
95.25
101.60
nternal Threading is straight tapped from 1/2" to 2" . From 2.1/2" to 6" internal treading is taper tapped.

Steel Pipe Sockets
Standard : DIN 2986 - 1977 ISO 50
Nominal diameter in inch
3/8"
1/2"
3/4"
1"
1.1/4"
1.1/2"
2"
2.1/2"
3"
4"
5"
6"
Nominal diameter in mm
10
15
20
25
32
40
50
65
80
100
125
150
Diameter in mm
22
26.4
31.8
39.5
48.3
54.5
66.3
82
95
122
147
174
Length in mm
26
34
36
43
48
48
56
65
71
83
92
92

EN 10241 Standard Ex ISO/DIN Standards
Coupling
EN 10241 - Medium Type
DIN 2986-1977
DIN2999
ISO 50
ISO 7/BS 21
Nominal diameter in inch
1/8"
1/4"
3/8"
1/2"
3/4"
1"
1"1/4
1"1/2
2"
2"1/2
3"
4"
5"
6"
Nominal diameter in mm
6
8
10
15
20
25
32
40
50
65
80
100
125
150
Diameter in mm
15
18,5
21,3
26,6
31,8
39,5
48,3
54,5
66,2
82
95
121,4
146,3
173,3
Length in mm
17
25
26
34
36
43
48
48
56
65
71
83
92
92