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DIN 6903 Standard Dimensions for Washers for tapping screws and washers assemblies

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Washers for tapping screws and washers assemblies

Dimensional Drawing and Technical Diagrams

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Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 6903
Publication date: 12-1990 Supersedes : DIN 6903 12-1972
nominal thread diameter d1 nom=min d2 nom=max. form A d2 min. form A d2 nom=max. form B d2 min form B

h nom form A

 h nom form B ≈ weight in Kg x 1000 pcs (ρ=7,85 kg/dm3) ≈ weight in Kg x 1000 pcs (ρ=7,85 kg/dm3)
ST 2.9 2.5 7 6.78 9 8.78 1 1 0.26 0.46
ST 3.5 3 8 7.78 11 10.73 1 1 0.34 0.69
ST 3.9 3.3 9 8.78 12 11.73 0.43 0.82
ST 4.2 3.55 9 8.78 12 11.73 1 1 0.42 0.81
ST 4.8 4 10 9.78 15 14.73 1 1.6 0.52 2.06
ST 5.5 4.7 12 11.73 15 14.73 1.6 1.6 1.20 2
ST 6.3 5.4 14 13.73 18 17.73 1.6 1.6 1.65 2.91
ST 8 7.15 16 15.73 24 23.67 1.6 2 2.02 6.47

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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