Conical spring washers for screw and washer assemblies

This norm DIN 6908 specifies sizes and mechanical properties as well as functional properties of conical spring washers assemblies. Conical Spring washers as per DIN 6908 are intended for use with screw and washer assemblies as specified in DIN 6900 part 5.They are designed to use with bolted connections with bolts of property classes 8.8 to 10.9 (as specified in ISO 898 Part 1).

Dimensional Drawing and Technical Diagrams

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Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 6908

Publication date: 08-1995 Supersedes DIN 6908: 12-1990
d thread size d1 min=nom d2 max=nom s h min h max
M 2.5
2.25
6
0.5
0.61
0.72
M 3
2.75
7
0.6
0.72
0.85
M 3.5
3.20
8
0.8
0.92
1.06
M 4
3.60
9
1.0
1.12
1.3
M 5
4.55
11
1.2
1.35
1.55
M 6
5.50
14
1.5
2.30
2.6
M 8
7.40
18
2.0
2.80
3.1
M 10
9.30
23
2.5
3.30
3.6
M 12
11.0
29
3.0
3.80
4.1