ASTM A194 Grade 2H Heavy Hex Nuts B18.2.2

High Temperature Carbon Steel Nuts

Heavy Hex Nuts B18.2.2

Heavy Hex Nuts B18.2.2

Dimensions of Heavy Hex Nuts B18.2.2

Nominal Size
Inch		 Basic Major
Thread Diameter		 Width Across Flats, F Width Across Corners, G Thickness Heavy Hex Nuts, H
Basic Min. Max. Min. Max. Basic Min. Max.
1/4 0.2500 1/2 0.488 0.500 0.556 0.577 15/64 0.218 0.250
5/16 0.3125 9/16 0.546 0.562 0.622 0.650 19/64 0.280 0.314
3/8 0.3750 11/16 0.669 0.688 0.763 0.794 23/64 0.341 0.377
7/16 0.4375 3/4 0.728 0.750 0.830 0.866 27/64 0.403 0.441
1/2 0.5000 7/8 0.850 0.875 0.969 1.010 31/64 0.464 0.504
9/16 0.5625 15/16 0.909 0.938 1.037 1.083 35/64 0.526 0.568
5/8 0.6250 1 1/16 1.031 1.062 1.175 1.227 39/64 0.587 0.631
3/4 0.7500 1 1/4 1.212 1.250 1.382 1.443 47/64 0.710 0.758
7/8 0.8750 1 7/16 1.394 1.438 1.589 1.660 55/64 0.833 0.885
1 1.0000 1 5/8 1.575 1.625 1.796 1.876 63/64 0.956 1.012
1 1/8 1.1250 1 13/16 1.756 1.812 2.002 2.093 1 7/64 1.079 1.139
1 1/4 1.2500 2 1.938 2.000 2.209 2.309 1 7/32 1.187 1.251
1 3/8 1.3750 2 3/16 2.119 2.188 2.416 2.526 1 11/32 1.310 1.378
1 1/2 1.5000 2 3/8 2.300 2.375 2.622 2.742 1 15/32 1.433 1.505
1 5/8 1.6250 2 9/16 2.481 2.562 2.828 2.959 1 19/32 1.556 1.632
1 3/4 1.7500 2 3/4 2.662 2.750 3.035 3.175 1 23/32 1.679 1.759
1 7/8 1.8750 2 15/16 2.844 2.938 3.242 3.392 1 27/32 1.802 1.886
2 2.0000 3 1/8 3.025 3.125 3.449 3.608 1 31/32 1.925 2.013
2 1/4 2.2500 3 1/2 3.388 3.500 3.862 4.041 2 13/64 2.155 2.251
2 1/2 2.5000 3 7/8 3.750 3.875 4.275 4.474 2 29/64 2.401 2.505
2 3/4 2.7500 4 1/4 4.112 4.250 4.688 4.907 2 45/64 2.647 2.759
3 3.0000 4 5/8 4.475 4.625 5.102 5.340 2 61/64 2.893 3.013
3 1/4 3.2500 5 4.838 5.000 5.515 5.774 3 3/16 3.124 3.252
3 1/2 3.5000 5 3/8 5.200 5.375 5.928 6.207 3 7/16 3.370 3.506
3 3/4 3.7500 5 3/4 5.562 5.750 6.341 6.640 3 11/16 3.616 3.760
4 4.0000 6 1/8 5.925 6.125 6.755 7.073 3 15/16 3.862 4.014