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BS 1083 2 Standard Dimensions for Hexagon head screws fully threaded

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Dimensional Drawing and Technical Diagrams

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Key Dimensions and Technical Parameters

Dimensions in inches (1 inch=25.4 mm) source BS 1083 Hexagon head screw, fully thread

Publication date: 08 / 1965
d Thread size
 Nr. of threads BSW

Nr. of threads BSF

 k min k max e max
s min
s mx
1/4
 20 26 0.166 0.176 0.51 0.438 0.445
5/16
 18 22 0.208 0.218 0.61 0.518 0.525
3/8
 16 20 0.250 0.260 0.69 0.592
0.600
7/16
 14 18 0.292 0.302 0.82 0.702
0.710
1/2
 12 16 0.333 0.343 0.95 0.812
0.820
9/16 12 16 0.365 0.375 1.06 0.912 0.920
5/8
 11 14 0.407 0.417 1.17 1.000
1.010
3/4
 10 12 0.480 0.500 1.39 1.190
1.200
7/8
 9 11 0.563 0.583 1.50 1.288
1.300
1
 8 10 0.636 0.666 1.71 1.468
1.480
1-1/8 7 9 0.710 0.750 1.93 1.640 1.670
1-1/4 7 9 0.790 0.830 2.15 1.815 1.860
1-3/8 6 8 0.880 0.920 2.37 2.005 2.050
1-1/2 6 8 0.960 1.000 2.56 2.175 2.220
1-3/4 5 7 1.110 1.170 2.98 2.520 2.580
2 4.5 7 1.270 1.330 3.19 2.700 2.760

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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