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Hex Cap Screw Dimensions

Body Diameter Basic Body Diameter Max Body Diameter Min Width Across Flats Basic Width Across Flats Max Width Across Flats Min Width Across Corners Max Width Across Corners Min Head Height Basic Head Height Max Head Height Min Thread Length 6" and Shorter Thread Length Over 6"
1/4 0.2500 0.2450 7/16 0.438 0.428 0.505 0.488 5/32 0.163 0.150 0.750 1.000
5/16 0.3125 0.3065 1/2 0.500 0.489 0.577 0.557 13/64 0.211 0.195 0.875 1.125
3/8 0.3750 0.3690 9/16 0.562 0.551 0.650 0.628 15/64 0.243 0.226 1.000 1.250
7/16 0.4375 0.4305 5/8 0.625 0.612 0.722 0.698 9/32 0.291 0.272 1.125 1.375
1/2 0.5000 0.4930 3/4 0.750 0.736 0.866 0.840 5/16 0.323 0.302 1.250 1.500
9/16 0.5625 0.5545 13/16 0.812 0.798 0.938 0.910 23/64 0.371 0.348 1.375 1.625
5/8 0.6250 0.6170 15/16 0.938 0.922 1.083 1.051 25/64 0.403 0.378 1.500 1.750
3/4 0.7500 0.7410 1-1/8 1.125 1.100 1.299 1.254 15/32 0.483 0.455 1.750 2.000
7/8 0.8750 0.8660 1-5/16 1.312 1.285 1.516 1.465 35/64 0.563 0.531 2.000 2.250
1 1.0000 0.9900 1-1/2 1.500 1.469 1.732 1.675 39/64 0.627 0.591 2.250 2.500
1-1/8 1.1250 1.1140 1-11/16 1.688 1.631 1.949 1.859 11/16 0.718 0.658 2.500 2.750
1-1/4 1.2500 1.2390 1-7/8 1.875 1.812 2.165 2.066 25/32 0.813 0.749 2.750 3.000
1-3/8 1.3750 1.3630 2-1/16 2.062 1.994 2.382 2.273 27/32 0.878 0.810 3.000 3.250
1-1/2 1.5000 1.4880 2-1/4 2.250 2.175 2.598 2.480 15/16 0.974 0.902 3.250 3.500
1-3/4 1.7500 1.7380 2-5/8 2.625 2.538 3.031 2.893 1-3/32 1.134 1.054 3.750 4.000
2 2.0000 1.9880 3 3.000 2.900 3.464 3.306 1-7/32 1.263 1.175 4.250 4.500
2-1/4 2.2500 2.2380 3-3/8 3.375 3.262 3.897 3.719 1-3/8 1.423 1.327 - 5.000
2-1/2 2.5000 2.4880 3-3/4 3.750 3.625 4.330 4.133 1-17/32 1.583 1.479 - 5.500
2-3/4 2.7500 2.7380 4-1/8 4.125 3.988 4.763 4.546 1-11/16 1.744 1.632 - 6.000
3 3.0000 2.9880 4-1/2 4.500 4.350 5.196 4.959 1-7/8 1.935 1.815 - 6.500