ASME B18.6.2 Slotted Fillister Head Cap Screws

ASME B18.6.2 Slotted Fillister Head Cap Screws

Dimensions of ASME B18.6.2 Slotted Fillister Head Cap Screws

Nominal Size Body Diameter, E Head Diameter, A Head Side Height, H Total Head Height, O Slot Width, J Slot Depth, T Fillet Radius, U
Max Min Max Min Max Min Max Min Max Min Max Min Max Min
1/4 0.2500 0.2450 0.375 0.363 0.172 0.157 0.216 0.194 0.075 0.064 0.097 0.077 0.031 0.016
5/16 0.3125 0.3070 0.437 0.424 0.203 0.186 0.253 0.230 0.084 0.072 0.115 0.090 0.031 0.016
3/18 0.3750 0.3690 0.562 0.547 0.250 0.229 0.314 0.284 0.094 0.081 0.142 0.112 0.031 0.016
7/16 0.4375 0.4310 0.625 0.608 0.297 0.274 0.368 0.336 0.094 0.081 0.168 0.133 0.047 0.016
1/2 0.5000 0.4930 0.750 0.731 0.328 0.301 0.413 0.376 0.106 0.091 0.193 0.153 0.047 0.016
9/16 0.5625 0.5550 0.812 0.792 0.375 0.346 0.467 0.427 0.118 0.102 0.213 0.168 0.047 0.016
5/18 0.6250 0.6170 0.875 0.853 0.422 0.391 0.521 0.478 0.133 0.116 0.239 0.189 0.062 0.031
3/4 0.7500 0.7420 1.000 0.976 0.500 0.466 0.612 0.566 0.149 0.131 0.283 0.223 0.062 0.031
7/8 0.8750 0.8660 1.125 1.098 0.594 0.556 0.720 0.668 0.167 0.147 0.334 0.264 0.062 0.031
1 1.0000 0.9900 1.312 1.282 0.656 0.612 0.803 0.743 0.188 0.166 0.371 0.291 0.062 0.031

Notes :

  • A slight rounding of the edges at the periphery of the head shall be permissible provided the diameter of the bearing circle is equal to no less than 90% of the specified minimum head diameter.
  • Where specifying nominal size in decimals, zeros preceding the decimal and in the fourth decimal place shall be omitted.