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NF E27-625 Standard Dimensions for Serrated lock washers: external form A, internal form J, form V

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This norm has been cancelled

Serrated lock washers: internal form J

This standard gives the main characteristics of flat-shaped serrated lock washers with overlapping internal teeth. These washers are intended to oppose the loosening of screwed fasteners. They can be used under the heads of right-hand threaded screws and nuts, of quality classes less than or equal to 8.8.

Dimensional Drawing and Technical Diagrams

1390_1WvNsV_nf-e27-625.jpg

Key Dimensions and Technical Parameters

Dimensions in mm: source NF E27-625 form JWithdrawn
The dimensions below refer to the washer not under stress
Publication date 10/1981
Thread size
 Form J
d1 H14
d2 JS15
s nom
 Nr. of teeth
M1.6 1.65 3.4 0.2 6
M 2
2.05
4.5
0.3
6
M 2.5
2.55
5.5
0.3
8
M 3
3.05
6
0.4
8
M3.5
3.65
7
0.4
8
M 4
4.10
8
0.5
8
M 4.5
4.60
8.5
0.5
8
M 5
5.10
9.2
0.6
8
M 6
6.10
11
0.7
10
M 7
7.20
12
0.7
12
M 8
8.10
14
0.8
12
M 10
10.20
18
0.9
12
M 12
12.30
20
1
14
M 14
14.30
24
1.1
16
M 16
16.30
26
1.2
16
M 18
18.5
30
 1.4 16
M 20
20.5
32.5
 1.4 16
M 22
23
36
 1.5 18
M 24
24.5
38
 1.5 20
M 27
27.60
44
 1.6 20
M 30
30.6
48
 1.6 22

Dimensions in mm: source NF E27-625 Form J narrowWithdrawn
The dimensions below refer to the washer not under stress
Publication date 10/1981
Thread size
 Form J NARROW
d1 H14
d2 JS15
s nom
 Nr. of teeth
M 2.5
2.55
4.7
0.3
6
M3.5
3.60
5.7
0.4
8
M 5
5.10
7.2
0.4
10
M 6
6.10
9.1
0.4
10
M 8
8.15
10.8
0.6
12
M 10
10.20
14.2
0.5
12
M 12
12.10
16.9
0.5
16
M 14
14.40
18.6
0.6
18
M 16
16.50
20.7
0.6
18

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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