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BS 4174 10 Standard Dimensions for Tapping screws, contersunk slotted flat head

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Slotted 80° truncated countersunk head screws

Dimensional Drawing and Technical Diagrams

1744_IMpwUx_4174-10.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source BS 4174 Slotted 80° truncated countesunk head screws - [Table 10]
Publication date: 09 -1972
Ø
dk max
 dk min k min
k max
t nom
n min
 n max
ST 2.2
 4.37 3.73 0.71 0.91 0.36 0.58 0.79
ST 2.9
 5.71 4.95 0.96 1.19 0.46 0.79 0.99
ST 3.5
 7.09 6.2 1.22 1.5 0.56 0.99 1.22
ST 4.2
 8.43 7.42 1.47 1.78 0.68 1.14 1.37
ST 4.8
 9.78 8.64 1.73 2.06 0.79 1.27 1.52
ST 5.5
 10.13 9.88 1.98 2.34 0.91 1.42 1.7
ST 6.3
 12.88 11.48 2.34 2.72 1.04 1.63 1.9
ST 8 16.13 14.43 2.95 3.4 1.32 1.83 2.13

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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