BS 2470 Specification

Hexagon Socket Head Cap Screws BS 2470

Hexagon Socket Head Cap Screws, BSW and BSF Thread BS 2470

Dimensions of hexagon socket head cap screws,BSW and BSF Thread BS 2470

Nominal Size D A H S J K W Fillet Radius C T
Body Diameter Head Diameter Head Height Head Side Height Hexagon Socket Size Key Engagement Wall Thickness F da Chamfer or Radius Thread length
Max. Min. Max. Min. Max. Min. Min. Nom. Min. Min. Min. Max. Max. Min.
3/16 0.1875 0.1815 0.312 0.303 0.187 0.182 0.168 5/32 0.089 0.065 0.009 0.2155 0.005 0.875
1/4 0.2500 0.2435 0.375 0.365 0.250 0.244 0.225 3/16 0.120 0.095 0.009 0.278 0.008 1.000
5/16 0.3125 0.3053 0.437 0.425 0.312 0.306 0.281 7/32 0.151 0.119 0.012 0.3465 0.008 1.125
3/8 0.3750 0.3678 0.562 0.550 0.375 0.368 0.337 5/16 0.182 0.143 0.015 0.415 0.008 1.250
7/16 0.4375 0.4294 0.625 0.611 0.437 0.430 0.394 5/16 0.213 0.166 0.018 0.4835 0.010 1.375
1/2 0.5000 0.4919 0.750 0.735 0.500 0.492 0.450 3/8 0.245 0.190 0.020 0.552 0.010 1.500
5/8 0.6250 0.6163 0.875 0.858 0.625 0.616 0.562 1/2 0.307 0.238 0.024 0.689 0.010 1.750
3/4 0.7500 0.7406 1.000 0.982 0.750 0.740 0.675 9/16 0.370 0.285 0.030 0.828 0.010 2.000
7/8 0.8750 0.8647 1.125 1.105 0.875 0.864 0.787 9/16 0.432 0.333 0.034 0.963 0.015 2.250
1 1.0000 0.9886 1.312 1.291 1.000 0.988 0.900 5/8 0.495 0.380 0.040 1.100 0.015 2.500