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Reference Tables -- Nut Dimensions, Properties
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Heavy Hex Nut Dimension Heavy Hex Nut Side Heavy Thin Hex Nut
Heavy Hex Nut and Heavy Hex Jam Nut Dimensions
Nominal
Size
F G H H1
Width
Across
Flats
Width
Across
Corners
Thickness
Heavy Hex Nuts
Thickness
Heavy Hex Jam Nuts
Basic Max Min Max Min Basic Max Min Basic Max Min
1/4 1/2 0.500 0.488 0.577 0.556 15/64 0.250 0.218 11/64 0.188 0.156
5/16 9/16 0.562 0.546 0.650 0.622 19/64 0.314 0.280 13/64 0.220 0.186
3/8 11/16 0.688 0.669 0.794 0.763 23/64 0.377 0.341 15/64 0.252 0.216
7/16 3/4 0.750 0.728 0.866 0.830 27/64 0.441 0.403 17/64 0.285 0.247
1/2 7/8 0.875 0.850 1.010 0.969 31/64 0.504 0.464 19/64 0.317 0.277
9/16 15/16 0.938 0.909 1.083 1.037 35/64 0.568 0.526 21/64 0.349 0.307
5/8 1 1/16 1.062 1.031 1.227 1.175 39/64 0.631 0.587 23/64 0.381 0.337
3/4 1 1/4 1.250 1.212 1.443 1.382 47/64 0.758 0.710 27/64 0.446 0.398
7/8 1 7/16 1.438 1.394 1.660 1.589 55/64 0.885 0.833 31/64 0.510 0.458
1 1 5/8 1.625 1.575 1.876 1.796 63/64 1.012 0.956 35/64 0.575 0.519
1 1/8 1 13/16 1.812 1.756 2.093 2.002 1 7/64 1.139 1.079 39/64 0.639 0.579
1 1/4 2 2.000 1.938 2.309 2.209 1 7/32 1.251 1.187 23/32 0.751 0.687
1 3/8 2 3/16 2.188 2.119 2.526 2.416 1 11/32 1.378 1.310 25/32 0.815 0.747
1 1/2 2 3/8 2.375 2.300 2.742 2.622 1 15/32 1.505 1.433 27/32 0.880 0.808
1 5/8 2 9/16 2.562 2.481 2.959 2.828 1 19/32 1.632 1.556 29/32 0.944 0.868
1 3/4 2 3/4 2.750 2.662 3.175 3.035 1 23/32 1.759 1.679 31/32 1.009 0.929
1 7/8 2 15/16 2.938 2.844 3.392 3.242 1 27/32 1.886 1.802 1 1/32 1.073 0.989
2 3 1/8 3.125 3.025 3.608 3.449 1 31/32 2.013 1.925 1 3/32 1.138 1.050
2 1/4 3 1/2 3.500 3.388 4.041 3.862 2 13/64 2.251 2.155 1 13/64 1.251 1.155
2 1/2 3 7/8 3.875 3.750 4.474 4.275 2 29/64 2.505 2.401 1 29/64 1.505 1.401
2 3/4 4 1/4 4.250 4.112 4.907 4.688 2 45/64 2.759 2.647 1 37/64 1.634 1.522
3 4 5/8 4.625 4.475 5.340 5.102 2 61/64 3.013 2.893 1 45/64 1.763 1.643
3 1/4 5 5.000 4.838 5.774 5.515 3 3/16 3.252 3.124 1 13/16 1.876 1.748
3 1/2 5 3/8 5.375 5.200 6.207 5.928 3 7/16 3.506 3.370 1 15/16 2.006 1.870
3 3/4 5 3/4 5.750 5.562 6.640 6.341 3 11/16 3.760 3.616 2 1/16 2.134 1.990
4 6 1/8 6.125 5.925 7.073 6.755 3 15/16 4.014 3.862 2 3/16 2.264 2.112

 

 

 

 

 

 


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