ASME B18.2.2 Heavy Hex Slotted Castle Nuts

ASME B18.2.2 Heavy Hex Slotted Nuts

Dimensions of Heavy Hex Slotted Nuts

Nominial Size Basic Major Diameter of Thread Width Across Flats, F Width Across Corners, G Thickness, H Unslotted Thickness, T Width of Slot, S Maximum Runout of Bearing Surface to Thread Axis, FLM
Basic Min. Max. Min. Max. Basic Min. Max. Min. Max. Min. Max.
1/4 0.2500 1/2 0.488 0.500 0.556 0.577 15/64 0.218 0.250 0.13 0.15 0.07 0.10 0.017
5/16 0.3125 9/16 0.546 0.562 0.622 0.650 19/64 0.280 0.314 0.19 0.21 0.09 0.12 0.020
3/8 0.3750 11/16 0.669 0.688 0.763 0.794 23/64 0.341 0.377 0.22 0.24 0.12 0.15 0.021
7/16 0.4375 3/4 0.728 0.750 0.830 0.866 27/64 0.403 0.441 0.26 0.28 0.12 0.15 0.022
1/2 0.5000 7/8 0.850 0.875 0.969 1.010 31/64 0.464 0.504 0.32 0.34 0.15 0.18 0.023
9/16 0.5625 15/16 0.909 0.938 1.037 1.083 35/64 0.526 0.568 0.35 0.37 0.15 0.18 0.024
5/8 0.6250 1 1/16 1.031 1.062 1.175 1.227 39/64 0.587 0.631 0.38 0.40 0.18 .024 0.025
3/4 0.7500 1 1/4 1.212 1.250 1.382 1.443 47/64 0.710 0.758 0.47 0.49 0.18 0.24 0.027
7/8 0.8750 1 7/16 1.394 1.438 1.589 1.660 55/64 0.833 0.885 0.59 0.62 0.18 0.24 0.029
1 1.0000 1 5/8 1.575 1.625 1.796 1.876 63/64 0.956 1.012 0.69 0.72 0.24 0.30 0.031
1 1/8 1.1250 1 13/16 1.756 1.812 2.002 2.093 1 7/64 1.079 1.139 0.75 0.78 0.24 0.30 0.033
1 1/4 1.2500 2 1.938 2.000 2.209 2.309 1 7/32 1.187 1.251 0.83 0.86 0.31 0.40 0.035
1 3/8 1.3750 2 3/16 2.119 2.188 2.416 2.526 1 11/32 1.310 1.378 0.95 0.99 0.31 0.40 0.038
1 1/2 1.5000 2 3/8 2.300 2.375 2.622 2.742 1 15/32 1.433 1.505 1.01 1.05 0.37 0.46 0.041
1 3/4 1.7500 2 3/4 2.662 2.750 3.035 3.175 1 23/32 1.679 1.759 1.20 1.24 0.43 0.52 0.048
2 2.0000 3 1/8 3.025 3.125 3.449 3.608 1 31/32 1.925 2.013 1.38 1.43 0.43 0.52 0.055
2 1/4 2.2500 3 1/2 3.388 3.500 3.862 4.041 2 13/64 2.155 2.251 1.62 1.67 0.43 0.52 0.061
2 1/2 2.5000 3 7/8 3.750 3.875 4.275 4.474 2 29/64 2.401 2.505 1.74 1.79 0.55 0.64 0.068
2 3/4 2.7500 4 1/4 4.112 4.250 4.688 4.907 2 45/64 2.647 2.759 1.99 2.05 0.55 0.64 0.074
3 3.0000 4 5/8 4.475 4.625 5.102 5.340 2 61/64 2.893 3.013 2.17 2.23 0.62 0.71 0.081
3 1/4 3.2500 5 4.838 5.000 5.515 5.774 3 3/16 3.124 3.252 2.41 2.47 0.62 0.71 0.087
3 1/2 3.5000 5 3/8 5.200 5.375 5.928 6.207 3 7/16 3.370 3.506 2.65 2.72 0.62 0.71 0.094
3 3/4 3.7500 5 3/4 5.562 5.750 6.341 6.640 3 11/16 3.616 3.760 2.90 2.97 0.62 0.71 0.100
4 4.0000 6 1/8 5.925 6.125 6.755 7.073 3 15/16 3.862 4.014 3.15 3.22 0.62 0.71 0.107