Dimensions
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Nominal Size | Basic Major Diameter of Thread | F | G | H | Maximum Runout of Bearing Surface to Thread Axis, FIM (Specified Proof Load) | ||||||
Width Across Flats | Width Across Corners | Thickness Heavy Hex Nuts | |||||||||
Basic | Min | Max | Min | Max | Basic | Min | Max | Up to 150,000 psi | 150,000 psi and Greater | ||
1/4 | 0.2500 | 1/2 | 0.488 | 0.500 | 0.556 | 0.577 | 15/64 | 0.218 | 0.250 | 0.017 | 0.011 |
5/16 | 0.3125 | 9/16 | 0.546 | 0.562 | 0.622 | 0.650 | 19/64 | 0.280 | 0.314 | 0.020 | 0.012 |
3/8 | 0.3750 | 11/16 | 0.669 | 0.688 | 0.763 | 0.794 | 23/64 | 0.341 | 0.377 | 0.021 | 0.014 |
7/16 | 0.4375 | 3/4 | 0.728 | 0.750 | 0.830 | 0.866 | 27/64 | 0.403 | 0.441 | 0.022 | 0.015 |
1/2 | 0.5000 | 7/8 | 0.850 | 0.875 | 0.969 | 1.010 | 31/64 | 0.464 | 0.504 | 0.023 | 0.016 |
9/16 | 0.5625 | 15/16 | 0.909 | 0.938 | 1.037 | 1.083 | 35/64 | 0.526 | 0.568 | 0.024 | 0.017 |
5/8 | 0.6250 | 1-1/16 | 1.031 | 1.062 | 1.175 | 1.227 | 39/64 | 0.587 | 0.631 | 0.025 | 0.018 |
3/4 | 0.7500 | 1-1/4 | 1.212 | 1.250 | 1.382 | 1.443 | 47/64 | 0.710 | 0.758 | 0.027 | 0.020 |
7/8 | 0.8750 | 1-7/16 | 1.394 | 1.438 | 1.589 | 1.660 | 55/64 | 0.833 | 0.885 | 0.029 | 0.022 |
1 | 1.0000 | 1-5/8 | 1.575 | 1.625 | 1.796 | 1.876 | 63/64 | 0.956 | 1.012 | 0.031 | 0.024 |
1-1/8 | 1.1250 | 1-13/16 | 1.756 | 1.812 | 2.002 | 2.093 | 1-7/64 | 1.079 | 1.139 | 0.033 | 0.027 |
1-1/4 | 1.2500 | 2 | 1.938 | 2.000 | 2.209 | 2.309 | 1-7/32 | 1.187 | 1.251 | 0.035 | 0.030 |
1-3/8 | 1.3750 | 2-3/16 | 2.119 | 2.188 | 2.416 | 2.526 | 1-11/32 | 1.310 | 1.378 | 0.038 | 0.033 |
1-1/2 | 1.5000 | 2-3/8 | 2.300 | 2.375 | 2.622 | 2.742 | 1-15/32 | 1.433 | 1.505 | 0.041 | 0.036 |
1-5/8 | 1.6250 | 2-9/16 | 2.481 | 2.562 | 2.828 | 2.959 | 1-19/32 | 1.556 | 1.632 | 0.044 | 0.038 |
1-3/4 | 1.7500 | 2-3/4 | 2.662 | 2.750 | 3.035 | 3.175 | 1-23/32 | 1.679 | 1.759 | 0.048 | 0.041 |
1-7/8 | 1.8750 | 2-15/16 | 2.844 | 2.938 | 3.242 | 3.392 | 1-27/32 | 1.802 | 1.886 | 0.051 | 0.044 |
2 | 2.0000 | 3-1/8 | 3.025 | 3.125 | 3.449 | 3.608 | 1-31/32 | 1.925 | 2.013 | 0.055 | 0.047 |
2-1/4 | 2.2500 | 3-1/2 | 3.388 | 3.500 | 3.862 | 4.041 | 2-13/64 | 2.155 | 2.251 | 0.061 | 0.052 |
2-1/2 | 2.5000 | 3-7/8 | 3.750 | 3.875 | 4.275 | 4.474 | 2-29/64 | 2.401 | 2.505 | 0.068 | 0.058 |
2-3/4 | 2.7500 | 4-1/4 | 4.112 | 4.250 | 4.688 | 4.907 | 2-45/64 | 2.647 | 2.759 | 0.074 | 0.064 |
3 | 3.0000 | 4-5/8 | 4.475 | 4.625 | 5.102 | 5.340 | 2-61/64 | 2.893 | 3.013 | 0.081 | 0.070 |
3-1/4 | 3.2500 | 5 | 4.838 | 5.000 | 5.515 | 5.774 | 3-3/16 | 3.124 | 3.252 | 0.087 | 0.075 |
3-1/2 | 3.5000 | 5-3/8 | 5.200 | 5.375 | 5.928 | 6.207 | 3-7/16 | 3.370 | 3.506 | 0.094 | 0.081 |
3-3/4 | 3.7500 | 5-3/4 | 5.562 | 5.750 | 6.341 | 6.640 | 3-11/16 | 3.616 | 3.760 | 0.100 | 0.087 |
4 | 4.000 | 6-1/8 | 5.925 | 6.125 | 6.755 | 7.073 | 3-15/16 | 3.862 | 4.014 | 0.107 | 0.093 |