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DIN 128 Standard Dimensions for Curved spring lock washers

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This norm has been cancelled

Curved spring lock washers

Spring lock washers covered in this standard DIN 128 are deemed to be spring washers designed for use with bolt/nut assemblies involving fasteners of a property class less then 8.8, as specified in ISO 898 part 1. They are intended to counteract the effect of setting which results in bolt/nut assemblies working loose (see DIN 267 part 26). They do not effectively prevent loosening of the assembly under varying radial load and are designed for use with short bolts predominantly subject to thrust.

Dimensional Drawing and Technical Diagrams

288_1tkclI_128.png

Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 128 - Withdrawn
Publication date: 10/1994 - Supersedes DIN 128: 10/1978

d Nominal size

 Thread size d min d1 max b nom s nom h min r ≈ mass in Kg x 1000 pcs (ρ=7,85 kg/dm3)
2
M 2
2.1
4.4
 0.9
0.5
0.7
 0.1 0.035
2.5
M 2.5
2.6
5.1
 1
0.6
0.9
 0.1 0.055
3
M 3
3.1
6.2
 1.3
0.7
1.1
 0.1 0.09
3.5
M 3.5
3.6
6.7
 1.3
0.7
1.1
 0.1 0.1
4
M 4
4.1
7.6
 1.5
0.8
1.2
 0.2 0.15
5
M 5
5.1
9.2
 1.8
1
1.5
 0.2 0.3
6
M 6
6.1
11.8
 2.5
1.3
2
 0.3 0.7
7
M 7
7.1
12.8
 2.5
1.3
2
 0.3 0.75
8
M 8
8.1
14.8
 3
1.6
2.45
 0.5 1.3
10
M 10
10.2
18.1
 3.5
1.8
2.85
 0.5 2.1
12
M 12
12.2
21.1
 4
2.1
3.35
 1 3.2
14
M 14
14.2
24.1
 4.9
2.4
3.9
 1 4.8
16
M 16
16.2
27.4
 5
2.8
4.5
 1 7
18
M 18
18.2
29.4
 5
2.8
4.5
 1 7.8
20
M 20
20.2
33.6
 6
3.2
5.1
 1 12.2
22
M 22
22.5
35.9
 6
3.2
5.1
 1 13.3
24
M 24
24.5
40.0
 7
4.0
6.5
 1.6 21.5
27
M 27
27.5
43.0
 7
4.0
6.5
 1.6 23.7
30
M 30
30.5
48.2
 8
6.0
9.5
 1.6 42.5
36
M 36
36.5
58.2
 10
6.0
10.3
 1.6 68
42 M 42 42.5 68.2 12 7 12 2 111
48 M 48 49 75 12 7 12 2 123
56 M 56 57 87 14 8 14 2 193
64 M 64 65 95 14 8 14 2 218
72 M 72 73 103 14 8 14 2 240
80 M 80 81 111 14 8 14 2 262
90 M 90 91 121 14 8 14 2 290
100 M 100 101 131 14 8 14 2 318

Dimensions in mm - source DIN 128 - Withdrawn
Publication date: 10/1987 - Supersedes DIN 128: 04/1968
Nominal size Thread size d min d1 max b s nom h min r ≈ mass in Kg x 1000 pcs (ρ=7,85 kg/dm3)
2
M 2
2.1
4.4
 0.9
0.5
0.7
 0.1 0.035
2.5
M 2.5
2.6
5.1
 1
0.6
0.9
 0.1 0.055
3
M 3
3.1
6.2
 1.3
0.7
1.1
 0.1 0.09
3.5
M 3.5
3.6
6.7
 1.3
0.7
1.1
 0.1 0.1
4
M 4
4.1
7.6
 1.5
0.8
1.2
 0.2 0.15
5
M 5
5.1
9.2
 1.8
1
1.5
 0.2 0.3
6
M 6
6.1
11.8
 2.5
1.3
2
 0.3 0.7
7
M 7
7.1
12.8
 2.5
1.3
2
 0.3 0.75
8
M 8
8.1
14.8
 3
1.6
2.45
 0.5 1.3
10
M 10
10.2
18.1
 3.5
1.8
2.85
 0.5 2.1
12
M 12
12.2
21.1
 4
2.1
3.35
 1 3.2
14
M 14
14.2
24.1
 4.9
2.4
3.9
 1 4.8
16
M 16
16.2
27.4
 5
2.8
4.5
 1 7
18
M 18
18.2
29.4
 5
2.8
4.5
 1 7.8
20
M 20
20.2
33.6
 6
3.2
5.1
 1 12.2
22
M 22
22.5
35.9
 6
3.2
5.1
 1 13.3
24
M 24
24.5
40.0
 7
4.0
6.5
 1.6 21.5
27
M 27
27.5
43.0
 7
4.0
6.5
 1.6 23.7
30
M 30
30.5
48.2
 8
6.0
9.5
 1.6 42.5
36
M 36
36.5
58.2
 10
6.0
10.3
 1.6 68
42 M 42 42.5 68.2 12 7 12 2 111
48 M 48 49 75 12 7 12 2 123
56 M 56 57 87 14 8 14 2 193
64 M 64 65 95 14 8 14 2 218
72 M 72 73 103 14 8 14 2 240
80 M 80 81 111 14 8 14 2 262
90 M 90 91 121 14 8 14 2 290
100 M 100 101 131 14 8 14 2 318

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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