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DIN 34800 Standard Dimensions for Bolts and screws with external hexalobular driving feature with small flange

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Bolts and screws with external hexalobular driving feature with small flange

This standard specifies dimensions and technical delivery conditions from M4 to M20 coarse and fine pitch thread steel hexalobular head bolts with small flange, of property classes 8.8, 10.9, A2-70 and A4-70 and product grades A and B.

Dimensional Drawing and Technical Diagrams

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Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 34800
Publication Date: 04/2022 - Supersedes DIN 34800: 11/2016
d thread size P b k nom=max c min/max dc nom=max ds min/max dt nom
M 4 0.7 35 4.5 1.05 1.3 7.88 3.82 4 4.6
M 5 0.8 40 5.5 1.45 1.70 8.88 4.82 5 5.55
M 6 1 50 6.5 1.55 1.8 10.88 5.82 6 7.30
M 8 1.25 65 8.2 2.25 2.5 13.73 7.78 8 9.20
M 10 1.5 80 10 2.95 3.2 16.83 9.78 10 10.95
M 12 1.75 80 12 3.6 3.9 18.83 11.73 12 12.65
M 14 2 80 14 3.9 4.2 21.93 13.73 14 16.40
M 16 2 80 16 4.8 5.10 25.09 15.73 16 18.15
M 18 2.5 80 18 4.9 5.2 28.04 17.73 18 21.85
M 20 2.5 80 20 6.2 6.5 31.09 19.67 20 21.85

Dimensions in mm - source DIN 34800
Publication Date:11/2016 - Supersedes DIN 34800: 09/2005
d thread size P b k nom=max c min/max dc nom=max ds min/max dt nom
M 4 0.7 35 4.5 1.05 1.3 7.88 3.82 4 4.6
M 5 0.8 40 5.5 1.45 1.70 8.88 4.82 5 5.55
M 6 1 50 6.5 1.55 1.8 10.88 5.82 6 7.30
M 8 1.25 65 8.2 2.25 2.5 13.73 7.78 8 9.20
M 10 1.5 80 10 2.95 3.2 16.83 9.78 10 10.95
M 12 1.75 80 12 3.6 3.9 18.83 11.73 12 12.65
M 14 2 80 14 3.9 4.2 21.93 13.73 14 16.40
M 16 2 80 16 4.8 5.10 25.09 15.73 16 18.15
M 18 2.5 80 18 4.9 5.2 28.04 17.73 18 21.85
M 20 2.5 80 20 6.2 6.5 31.09 19.67 20 21.85

Dimensions in mm - source DIN 34800
Publication Date: 09/2005 - Supersedes DIN 34800: 04/2000
d thread size P b k nom=max c min/max dc nom=max ds min/max df nom
M 4 0.7 35 4.5 1.05 1.3 7.66 3.82 4 4.6
M 5 0.8 40 5.5 1.45 1.70 8.79 4.82 5 5.55
M 6 1 50 6.5 1.55 1.8 11.05 5.82 6 7.30
M 8 1.25 65 8.2 2.25 2.5 14.38 7.78 8 9.20
M 10 1.5 80 10 2.95 3.2 17.77 9.78 10 10.95
M 12 1.75 80 12 3.6 3.9 20.03 11.73 12 12.65
M 14 2 80 14 3.9 4.2 23.60 13.73 14 16.40
M 16 2 80 16 4.8 5.10 26.75 15.73 16 18.15
M 18 2.5 80 18 4.9 5.2 30.14 17.73 18 21.85
M 20 2.5 80 20 6.2 6.5 33.53 19.67 20 21.85

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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