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ASME B18.2.2 Hex Nuts

ASME B18.2.2 Hex Nuts

ASME B18.2.2 Hex Nuts Dimensions (mm)

Nominal Size Basic Major Diameter of Thread Width Across Flats, F Width Across Corners, G Thickness, H Maximum Runout of Bearing Surface
to Thread Axis, FIM
Min. Max Min. Max Min. Max Up to 150,000 psi 150,000 psi and Greater
1/4 6.35 10.8712 11.1252 12.3952 12.827 5.3848 5.7404 0.381 0.254
5/16 7.9375 12.4206 12.7 14.1478 14.6558 6.5532 6.9342 0.4064 0.2794
3/8 9.525 13.9954 14.3002 15.9512 16.51 8.128 8.5598 0.4318 0.3048
7/16 11.1125 17.145 17.4752 19.5072 20.1676 9.271 9.779 0.4572 0.3302
1/2 12.7 18.6944 19.05 21.336 21.9964 10.8458 11.3792 0.4826 0.3556
9/16 14.2875 21.8694 22.225 24.9428 25.654 12.0142 12.5984 0.508 0.381
5/8 15.875 23.4188 23.8252 26.6954 27.5082 13.589 14.1986 0.5334 0.4064
3/4 19.05 27.6352 28.575 31.496 32.9946 15.6718 16.891 0.5842 0.4572
7/8 22.225 32.2326 33.3248 36.7538 38.5064 18.3896 19.7104 0.635 0.508
1 25.4 36.83 38.1 41.9862 43.9928 21.1074 22.5298 0.6858 0.5588
1 1/8 28.575 41.4274 42.8752 47.2186 49.5046 23.8506 25.3746 0.762 0.635
1 1/4 31.75 46.0248 47.625 52.4764 54.991 26.162 27.7876 0.8382 0.7112
1 3/8 34.925 50.6476 52.3748 57.7342 60.5028 28.9052 30.6324 0.9144 0.7874
1 1/2 38.1 55.245 57.15 62.992 65.9892 31.623 33.4518 0.9906 0.8636
1 5/8 41.275 59.69 61.722 68.0466 71.247 34.6456 35.9664 1.1176 0.9652
1 3/4 44.45 64.4652 66.675 73.4822 76.9874 37.084 39.116 1.2192 1.0414
1 7/8 47.625 69.1388 71.4502 78.8162 82.4738 39.8018 41.9354 1.2954 1.1176
2 50.8 73.66 76.2 83.9724 87.9856 42.545 44.7802 1.397 1.1938
2 1/4 57.15 82.8802 85.725 94.4626 98.9838 48.006 50.4444 1.5494 1.3208
2 1/2 63.5 92.075 95.25 104.9782 109.982 53.467 56.1086 1.7272 1.4732
2 3/4 69.85 101.2952 104.775 115.4684 120.9802 58.9026 61.7474 1.8796 1.6256
3 76.2 110.49 114.3 125.9586 131.9784 64.3636 67.4116 2.0574 1.778
3 1/4 82.55 119.7102 123.825 136.4742 142.9766 69.8246 73.0758 2.2098 1.905
3 1/2 88.9 128.905 133.35 146.9644 153.9748 75.2856 78.74 2.3876 2.0574
3 3/4 95.25 138.1252 142.875 157.4546 164.973 80.7212 84.3788 2.54 2.2098
4 101.6 147.32 152.4 167.9448 175.9712 86.1822 90.043 2.7178 2.3622

ASME B18.2.2 Hex Nuts Dimensions (Inch)

Nominal Size Basic Major Diameter of Thread Width Across Flats, F Width Across Corners, G Thickness, H Maximum Runout of Bearing Surface
to Thread Axis, FIM
Min. Max Min. Max Min. Max Up to 150,000 psi 150,000 psi and Greater
1/4 0.2500 0.428 0.438 0.488 0.505 0.212 0.226 0.015 0.010
5/16 0.3125 0.489 0.500 0.557 0.577 0.258 0.273 0.016 0.011
3/8 0.3750 0.551 0.563 0.628 0.650 0.320 0.337 0.017 0.012
7/16 0.4375 0.675 0.688 0.768 0.794 0.365 0.385 0.018 0.013
1/2 0.5000 0.736 0.750 0.840 0.866 0.427 0.448 0.019 0.014
9/16 0.5625 0.861 0.875 0.982 1.010 0.473 0.496 0.020 0.015
5/8 0.6250 0.922 0.938 1.051 1.083 0.535 0.559 0.021 0.016
3/4 0.7500 1.088 1.125 1.240 1.299 0.617 0.665 0.023 0.018
7/8 0.8750 1.269 1.312 1.447 1.516 0.724 0.776 0.025 0.020
1 1.0000 1.450 1.500 1.653 1.732 0.831 0.887 0.027 0.022
1 1/8 1.1250 1.631 1.688 1.859 1.949 0.939 0.999 0.030 0.025
1 1/4 1.2500 1.812 1.875 2.066 2.165 1.030 1.094 0.033 0.028
1 3/8 1.3750 1.994 2.062 2.273 2.382 1.138 1.206 0.036 0.031
1 1/2 1.5000 2.175 2.250 2.480 2.598 1.245 1.317 0.039 0.034
1 5/8 1.6250 2.35 2.43 2.679 2.805 1.364 1.416 0.044 0.038
1 3/4 1.7500 2.538 2.625 2.893 3.031 1.460 1.540 0.048 0.041
1 7/8 1.8750 2.722 2.813 3.103 3.247 1.567 1.651 0.051 0.044
2 2.0000 2.900 3.000 3.306 3.464 1.675 1.763 0.055 0.047
2 1/4 2.2500 3.263 3.375 3.719 3.897 1.890 1.986 0.061 0.052
2 1/2 2.5000 3.625 3.750 4.133 4.330 2.105 2.209 0.068 0.058
2 3/4 2.7500 3.988 4.125 4.546 4.763 2.319 2.431 0.074 0.064
3 3.0000 4.350 4.500 4.959 5.196 2.534 2.654 0.081 0.070
3 1/4 3.2500 4.713 4.875 5.373 5.629 2.749 2.877 0.087 0.075
3 1/2 3.5000 5.075 5.250 5.786 6.062 2.964 3.100 0.094 0.081
3 3/4 3.7500 5.438 5.625 6.199 6.495 3.178 3.322 0.100 0.087
4 4.0000 5.800 6.000 6.612 6.928 3.393 3.545 0.107 0.093