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BS 4174 12 Standard Dimensions for Tapping screws, slotted raised head

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Tapping screws, slotted raised head 

Dimensional Drawing and Technical Diagrams

1747_txpJh3_bs_4174_12.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source BS 4174 Table 12 80° slotted raised countersunk head tapping screws:

Publication date: 10 - 1972
Ø thread size
dk min
 dk mx
k max
t nom
n min
 n max f nom
ST 2.2
 3.73 4.37 1.3 1.04 0.58 0.79 0.64
ST 2.9
 4.95 5.71 1.7 1.37 0.79 0.99 0.84
ST 3.5
 6.2 7.09 2.11 1.7 0.99 1.22 1.02
ST 4.2
 7.42 8.43 2.54 2.03 1.14 1.37 1.22
ST 4.8
 8.64 9.78 2.95 2.39 1.27 1.52 1.4
ST 5.5
 9.88 11.13 3.35 2.72 1.402 1.7 1.6
ST 6.3
 11.48 12.88 3.89 3.15 1.63 1.9 1.83
ST 8 14.43 16.13 4.85 3.96 1.83 2.13 2.29

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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