GN 749Threaded plugs

Threaded plugs

Steel, zinc plated

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Threaded plugs
Threaded plugs

GN 749

Catalogue
d1
d2 h14
d3
l1
l2
s
Max. permissible
operating pressure
in PB
Recommended
tourque in Nm
M 8 x 1
12
9.9
8
4
4
400
8
5
M 8 x 1
12
9.9
8
4
4
400
8
5
M 10 x 1
14
11.9
8
4
5
400
12
8
M 10 x 1
14
11.9
8
4
5
400
12
7
M 12 x 1.5
17
14.4
12
5
6
400
25
15
M 12 x 1.5
17
14.4
12
5
6
400
25
14
M 14 x 1.5
19
16.5
12
5
6
400
30
10
M 14 x 1.5
19
16.5
12
5
6
400
30
19
M 16 x 1.5
22
18.9
12
5
8
400
50
24
M 16 x 1.5
22
18.9
12
5
8
400
50
25
M 18 x 1.5
24
20.9
12
5
8
400
60
31
M 18 x 1.5
24
20.9
12
5
8
400
60
31
M 20 x 1.5
26
22.9
14
5
10
400
70
40
M 20 x 1.5
26
22.9
14
5
10
400
70
41
M 22 x 1.5
27
24.3
14
5
10
400
80
49
M 22 x 1.5
27
24.3
14
5
10
400
80
48
M 24 x 1.5
30
26.9
14
5
12
400
95
57
M 24 x 1.5
30
26.9
14
5
12
400
95
57
M 26 x 1.5
32
29.2
16
5
12
400
120
80
M 26 x 1.5
32
29.2
16
5
12
400
120
75
M 27 x 2
32
29.2
16
5
12
400
120
80
M 27 x 2
32
29.2
16
5
12
400
120
80
M 30 x 1.5
37
32.7
16
6.5
17
400
190
103
M 30 x 1.5
37
32.7
16
6.5
17
400
190
104
M 33 x 2
40
35.7
16
6.5
17
400
225
126
M 33 x 2
40
35.7
16
6.5
17
400
225
127
M 42 x 2
50
45.8
16
6.5
22
315
360
202
M 42 x 2
50
45.8
16
6.5
22
315
360
196
M 48 x 2
55
50.7
16
6.5
24
315
400
250
M 48 x 2
55
50.7
16
6.5
24
315
400
254
G 1/8
14
11.9
8
4
5
400
12
7
G 1/8
14
11.9
8
4
5
400
12
7
G 1/4
19
16.5
12
5
6
400
30
18
G 1/4
19
16.5
12
5
6
400
30
18
G 3/8
22
18.9
12
5
8
400
50
26
G 3/8
22
18.9
12
5
8
400
50
26
G 1/2
27
23.9
14
5
10
400
80
45
G 1/2
27
23.9
14
5
10
400
80
44
G 3/4
32
29.2
16
5
12
400
120
75
G 3/4
32
29.2
16
5
12
400
120
70
G 1
40
35.7
16
6.5
17
400
225
115
G 1
40
35.7
16
6.5
17
400
225
124
G 1 1/4
50
45.8
16
6.5
22
315
360
195
G 1 1/4
50
45.8
16
6.5
22
315
360
195
G 1 1/2
55
50.7
16
6.5
24
315
400
240
G 1 1/2
55
50.7
16
6.5
24
315
400
240

Types

  • Type A: Sealing ring rubber NBR (Perbunan)
  • Type B: Sealing ring rubber FPM (Viton®)

Steel

  • Tensile strength class 5.8
  • ultrasonically and tensile tested
  • zinc plated, nano-passivated (silver / yellowish)

Type A

temperature resistant up to 100 °C

Sealing ring rubber NBR (Perbunan)

Type B

temperature resistant up tp 180 °C

Sealing ring rubber FPM (Viton®)

Identification by not black finish of the seal

The dimensions of the threaded plugs GN 749 comply with DIN 908 -, but deviating from the latter is the elastic sealing ring (rubber). This sealling ring is retained in a radial undercut in the mating face which prevents it from dropping out and in particular it does not extrude when the plug is tightened.

The details relating to the permissible operating pressure are non-binding recommended values and rule out any liability. They constitute no general warranty of quality and condition. The user must determine from case to case whether a product is suitable for the intended use.

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