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DIN 137 Standard Dimensions for Nails round head plain and countersunk

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Technical History and International Equivalents of DIN 137

Equivalent standards: UNI 8840 NF E 27620

Spring washers, waved (Type A) and curved (Type B) 

Dimensions for d1 and d2 apply to plane (not domed or undulated) spring washers. Surfaces to be smooth and free of rolling defects and bur. Spring washers are supplied raw. Spring characteristics shall not be reduced by surface protections applied. The material for spring washers shall be spring steel, having a C-content of 0,3-0,45%

Dimensional Drawing and Technical Diagrams

19_4042.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 137 A
Date of publication: 1985 - Norm cancelled without replacement
Thread size

d min/nom

d1nom

 h min h max
s nom
 ≈ mass in Kg x 1000 pcs (ρ=7,85 kg/dm3)
M 2
2.2
4.5
0.5
1
 0.3 0.028
M 2.3
2.5
5
0.5
1
 0.3 0.035
M 2.5
2.8
5.5
0.55
1.1
 0.3 0.041
M 3
3.2
6
0.65
1.3
 0.4 0.063
M 3.5
3.7
7
0.7
1.4
 0.4 0.088
M 4
4.3
8
0.8
1.6
 0.5 0.14
M 5
5.3
10
0.9
1.8
 0.5 0.222
M 6
6.4
11
1.1
2.2
 0.5 0.247
M 7
7.4
12
1.2
2.4
 0.5 0.361
M 8
8.4
15
1.7
3.4
 0.5 0.476
M 10
10.5
18
2
4
 0.8 1.05

Dimensions in mm - source DIN 137 B
Date of publication: 1985 - Norm cancelled without replacement
Thread size

d min/nom

d1 nom

 h min h max s min ≈ mass in Kg x 1000 pcs (ρ=7,85 kg/dm3)
M 3
3.2
8
 0.8 1.6
0.5
 0.166
M 3.5
3.7
8
 0.9 1.8
0.5
 0.154
M 4
4.3
9
 1 2
0.5
 0.193
M 5
5.3
11
 1.1 2.2
0.5
 0.286
M 6
6.4
12
 1.3 2.6
0.5
 0.318
M 7
7.4
14
 1.5 3
0.8
 0.535
M 8
8.4
15
 1.5 3
0.8
 0.76
M 10
10.5
21
 2.1 4.2
1
 2.04
M 12
13
24
 2.5 5
1.2
 3.01
M 14
15
28.0
 3 6
1.6
 5.17
M 16
17
30
 3.2 6.4
1.6
 5.65
M 18
19
34
 3.3 6.6
1.6
 7.35
M 20
21
36
 3.7 7.4
1.6
 8.43
M 22
23
40
 3.9 7.8
1.8
 11.9
M 24
25
44
 4.1 8.2
1.8
 14.5

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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