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BS 4190 6 Standard Dimensions for Hexagon head screws fully threaded

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Iso Metric Hexagon Head Screws Faced Under Head Only 

Dimensional Drawing and Technical Diagrams

1771_85csbr_bs-4190-6.jpg

Key Dimensions and Technical Parameters

Dimensions in mm- source BS 4190 Table 6 - Iso Metric Hexagon Head Screws Faced Under Head Only
Publication date: 10 - 2014 supersedes BS 4190: 2001
d thread size Pitch c dw min r max a max s k
max min max min
M 6 1 0.5 8.7 0.4 2.5 10 9.64 4.24 3.76
M 8 1.25 0.6 11.5 0.8 3 13 12.57 5.74 5.26
M 10 1.5 0.6 15.5 0.8 3.5 17 16.57 7.29 6.71
M 12 1.75 0.6 17.2 1.25 4 19 18.48 8.29 7.71
M 16 2 0.8 22 1.25 5 24 23.16 10.29 9.71
M 20 2.5 0.8 27.7 1.78 6 30 29.16 13.35 12.65
M 22 2.5 - - 1.78 6 32 31 14.35 13.65
M 24 3 0.8 33.2 1.78 7 36 35 15.35 14.65
M 27 3 - - 2.28 7 41 40 17.35 16.65
M 30 3.5 0.8 42.7 2.28 8 46 45 19.42 18.58
M 33 3.5 - - 2.28 8 50 49 21.42 20.58
M 36 4 0.8 51.1 2.7 10 55 53.8 23.42 22.58
M 39 4 - - 2.7 10 60 58.8 25.42 24.58
M 42 4.5 1 60.8 2.8 11 65 63.8 26.42 25.58
M 45 4.5 - - 3.3 11 70 68.8 28.42 27.58
M 48 5 1 70.8 3.8 12 75 73.8 30.42 29.58
M 52 5 - - 4.7 12 80 78.8 33.5 32.5
M 56 5.5 - - 4.9 19 85 83.6 35.5 34.5
M 60 5.5 - - 4.9 19 90 88.6 38.5 37.5
M 64 6 - - 4.9 21 95 93.6 40.5 39.5
M 68 6 - - 4.9 21 100 98.6 43.5 42.5

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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