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DIN 432 Standard Dimensions for External tab washers

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Technical History and International Equivalents of DIN 432

Equivalent standards: UNI 6599

External tab washers

This standard DIN 432 contains requirements on washers with external tab (Earlier called securety washers with nose) that are used in screw connections. They are intended to prevent a loosening of the connection. The effectiveness of the disk depends on the particular given design conditions and of the loading of the screw connection.

Dimensional Drawing and Technical Diagrams

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Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 432
Publication date: 11/1983 - Supersedes DIN 432: 07/1974

d thread size
d1
d2
d3
f
g
h
s
 Approximate weight, in kg x1000 pcs, (ρ=7,85 kg/dm3)
M 3
3.2
12
8
2.5
4.5
2
0.4
 0.33
M 3.5
3.7
12
8
2.5
4.5
2
0.4
 0.32
M 4
4.3
14
10
2.5
5.5
2
0.4
 0.44
M 5
5.3
17
12
3.5
7
2.5
0.75
 1.2
M 6
6.4
19
14
3.5
7.5
3
0.75
 1.48
M 7
7.4
19
14
3.5
7.5
3
0.75
 1.42
M 8
8.4
22
16
3.5
8.5
4
1
 2.54
M 10
10.5
26
20
4.5
10
4
1
 3.49
M 12
13
30
24
4.5
12
4.5
1.2
 5.48
M 14
15
33
27
4.5
13
4.5
1.2
 6.38
M 16
17
36
30
5.5
15
4.5
1.2
 7.45
M 18
19
40
34
6.5
18
4.5
1.2
 9.15
M 20
21
42
36
6.5
18
4.5
1.6
 13.1
M 22
23
50
43
7.5
20
6.5
1.6
 19.4
M 24
25
50
43
7.5
21
6.5
1.6
 18.5
M 27
28
58
50
8.5
23
9.5
1.6
 24.8
M 30
31
63
55
8.5
25
9.5
1.6
 29.8
M 33
34
68
60
9.5
28
9.5
1.6
 34.2
M 36
37
75
67
11
31
9.5
2
 52.5
M 39
40
82
74
11
33
11
2
 63.3
M 42
43
88
80
11
36
11
2
 72.5
M 45
46
95
85
13
38
12
2
 85.3
M 48
50
100
90
13
40
13
2
 93
M 52
54
105
95
13
42
13
2
 100
M 56
58
112
102
16
45
14
2.5
 141
M 60
62
118
108
16
48
13.5
2.5
 155
M 64
66
125
115
18
52
13.5
2.5
 174
M 68
70
132
122
18
55
14
2.5
 192
M 72
74
138
128
18
58
14
2.5
 209
M 76
78
145
135
21
60
14
2.5
 230
M 80
82
150
140
21
62
16
2.5
 242
M 90
93
165
155
23
70
15.5
2.5
 287
M 100
104
185
175
23
80
15.5
2.5
 370

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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