ASME B18.2.2 Heavy Square Nuts

ASME B18.2.2 Heavy Square Nuts

Dimensions of Heavy Square Nuts

Nominial Size Basic Major Diameter of Thread Width Across Flats, F Width Across Corners, G Thickness Bearing Surface Runout to Thread Axis, FLM
Basic Min. Max. Min. Max. Basic Min. Max.
1/4 0.2500 1/2 0.488 0.500 0.640 0.707 1/4 0.218 0.266 0.026
5/16 0.3125 9/16 0.546 0.562 0.720 0.795 5/16 0.280 0.330 0.030
3/8 0.3750 11/16 0.688 0.699 0.889 0.973 3/8 0.341 0.393 0.038
7/16 0.4375 3/4 0.728 0.750 0.970 1.060 7/16 0.403 0.456 0.039
1/2 0.5000 7/8 0.850 0.875 1.137 1.237 1/2 0.464 0.520 0.046
5/8 0.6250 1 1/16 1.031 1.062 1.386 1.503 5/8 0.587 0.647 0.056
3/4 0.7500 1 1/4 1.212 1.25 1.635 1.768 3/4 0.710 0.774 0.065
7/8 0.8750 1 7/16 1.394 1.438 1.884 2.033 7/8 0.833 0.901 0.075
1 1.0000 1 5/8 1.575 1.625 2.132 2.298 1 0.956 1.028 0.082
1 1/8 1.1250 1 13/16 1.756 1.812 2.381 2.563 1 1/8 1.079 1.155 0.063
1 1/4 1.2500 2 1.938 2.000 2.631 2.828 1 1/4 1.187 1.282 0.070
1 3/8 1.3750 2 3/16 2.119 2.188 2.879 3.094 1 3/8 1.310 1.409 0.076
1 1/2 1.5000 2 3/8 2.300 2.375 3.128 3.359 1 1/2 1.433 1.536 0.082