Portland Bolt Expands with Acquisition of Vermont-Based Applied Bolting Technology
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Heavy Hex Nut Dimensions

Click table to show drawingHeavy Hex Nut
Bolt Diam. F C H Weight
(lbs.)
Width Across Flats Width Across Corners Thickness
Basic Max Min Max Min Basic Max Min
1⁄2 7⁄8 0.875 0.850 1.010 0.969 31⁄64 0.504 0.464 0.07
5⁄8 11⁄16 1.062 1.031 1.227 1.175 39⁄64 0.631 0.587 0.12
3⁄4 11⁄4 1.250 1.212 1.443 1.382 47⁄64 0.758 0.710 0.20
7⁄8 17⁄16 1.438 1.394 1.660 1.589 55⁄64 0.885 0.833 0.30
1 15⁄8 1.625 1.575 1.876 1.796 63⁄64 1.012 0.956 0.43
11⁄8 113⁄16 1.812 1.756 2.093 2.002 17⁄64 1.139 1.079 0.59
11⁄4 2 2.000 1.938 2.309 2.209 17⁄32 1.251 1.187 0.79
13⁄8 23⁄16 2.188 2.119 2.526 2.416 111⁄32 1.378 1.310 1.02
11⁄2 23⁄8 2.375 2.300 2.742 2.622 115⁄32 1.505 1.433 1.31
15⁄8 29⁄16 2.562 2.481 2.959 2.828 119⁄32 1.632 1.556 1.62
13⁄4 23⁄4 2.750 2.662 3.175 3.035 123⁄32 1.759 1.679 2.04
17⁄8 215⁄16 2.938 2.844 3.392 3.242 127⁄32 1.886 1.802 2.41
2 31⁄8 3.125 3.025 3.608 3.449 131⁄32 2.013 1.925 2.99
21⁄4 31⁄2 3.500 3.388 4.041 3.862 213⁄64 2.251 2.155 4.19
21⁄2 37⁄8 3.875 3.750 4.474 4.275 229⁄64 2.505 2.401 5.64
23⁄4 41⁄4 4.250 4.112 4.907 4.688 245⁄64 2.759 2.647 7.38
3 45⁄8 4.625 4.475 5.340 5.102 261⁄64 3.013 2.893 9.50
31⁄4 5 5.000 4.838 5.774 5.515 33⁄16 3.252 3.124 11.94
31⁄2 53⁄8 5.375 5.200 6.207 5.928 37⁄16 3.506 3.370 15.26
33⁄4 53⁄4 5.750 5.562 6.640 6.341 311⁄16 3.760 3.616 18.12
4 61⁄8 6.125 5.925 7.073 6.755 315⁄16 4.014 3.862 21.80

Dimensions per ASME B18.2.2 1987 (1999)

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