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ASME B18.2.2 Hex Nuts and Hex Jam Nuts
Dimensions of Hex Nuts and Hex Jam Nuts |
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Nominial Size |
Basic Major Diameter of Thread |
Widtf Across Flats, F [Note(2)] |
Width Across Corners, G |
Thickness Hex Nuts,H |
Thickness Hex Flat Jam Nuts,H1 |
Maximum Runout of Bearing Surface to Thread Axis, FLM |
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HEX NUTS |
Hex Jam Nuts |
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Specified Proof load |
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Min. |
Max |
Min. |
Max. |
Min. |
Max |
Min. |
Max |
Up to 150,000psi |
150,000psi and Greater |
All Strength Levels |
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1/4 |
0.2500 |
0.428 |
0.438 |
0.488 |
0.505 |
0.212 |
0.226 |
0.150 |
0.163 |
0.015 |
0.010 |
0.015 |
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5/16 |
0.3125 |
0.489 |
0.500 |
0.557 |
0.577 |
0.258 |
0.273 |
0.180 |
0.195 |
0.016 |
0.011 |
0.016 |
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3/8 |
0.3750 |
0.551 |
0.563 |
0.628 |
0.650 |
0.320 |
0.337 |
0.210 |
0.227 |
0.017 |
0.012 |
0.017 |
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7/16 |
0.4375 |
0.675 |
0.688 |
0.768 |
0.794 |
0.365 |
0.385 |
0.240 |
0.260 |
0.018 |
0.013 |
0.018 |
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1/2 |
0.5000 |
0.736 |
0.750 |
0.840 |
0.866 |
0.427 |
0.448 |
0.302 |
0.323 |
0.019 |
0.014 |
0.019 |
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9/16 |
0.5625 |
0.861 |
0.875 |
0.982 |
1.010 |
0.473 |
0.496 |
0.301 |
0.324 |
0.020 |
0.015 |
0.020 |
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5/8 |
0.6250 |
0.922 |
0.938 |
1.051 |
1.083 |
0.535 |
0.559 |
0.363 |
0.387 |
0.021 |
0.016 |
0.021 |
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3/4 |
0.7500 |
1.088 |
1.125 |
1.240 |
1.299 |
0.617 |
0.665 |
0.398 |
0.446 |
0.023 |
0.018 |
0.023 |
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7/8 |
0.8750 |
1.269 |
1.312 |
1.447 |
1.516 |
0.724 |
0.776 |
0.458 |
0.510 |
0.025 |
0.020 |
0.025 |
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1 |
1.0000 |
1.450 |
1.500 |
1.653 |
1.732 |
0.831 |
0.887 |
0.519 |
0.575 |
0.027 |
0.022 |
0.027 |
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1 1/18 |
1.1250 |
1.631 |
1.688 |
1.859 |
1.949 |
0.939 |
0.999 |
0.579 |
0.639 |
0.030 |
0.025 |
0.030 |
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1 1/4 |
1.2500 |
1.812 |
1.875 |
2.066 |
2.165 |
1.030 |
1.094 |
0.687 |
0.751 |
0.033 |
0.028 |
0.033 |
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1 3/8 |
1.3750 |
1.994 |
2.062 |
2.273 |
2.382 |
1.138 |
1.206 |
0.747 |
0.815 |
0.036 |
0.031 |
0.036 |
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1 1/2 |
1.5000 |
2.175 |
2.250 |
2.480 |
2.598 |
1.245 |
1.317 |
0.808 |
0.880 |
0.039 |
0.034 |
0.039 |
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1 5/8 |
1.6250 |
2.350 |
2.430 |
2.679 |
2.805 |
1.364 |
1.416 |
0.868 |
0.944 |
0.044 |
0.038 |
0.044 |
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1 3/4 |
1.7500 |
2.538 |
2.625 |
2.893 |
3.031 |
1.460 |
1.540 |
0.929 |
1.009 |
0.048 |
0.041 |
0.048 |
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1 7/8 |
1.8750 |
2.722 |
2.813 |
3.103 |
3.247 |
1.567 |
1.651 |
0.989 |
1.009 |
0.051 |
0.044 |
0.051 |
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2 |
2.0000 |
2.900 |
3.000 |
3.306 |
3.464 |
1.675 |
1.763 |
0.105 |
1.138 |
0.055 |
0.047 |
0.055 |
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2 1/4 |
2.2500 |
3.263 |
3.375 |
3.719 |
3.897 |
1.890 |
1.986 |
1.155 |
1.267 |
0.061 |
0.052 |
0.061 |
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2 1/2 |
2.5000 |
3.625 |
3.750 |
4.133 |
4.330 |
2.105 |
2.209 |
1.401 |
1.427 |
0.068 |
0.058 |
0.068 |
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2 3/4 |
2.7500 |
3.988 |
4.125 |
4.546 |
4.763 |
2.319 |
2.431 |
1.522 |
1.556 |
0.074 |
0.064 |
0.074 |
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3 |
3.0000 |
4.350 |
4.500 |
4.959 |
5.196 |
2.534 |
2.654 |
1.643 |
1.685 |
0.081 |
0.070 |
0.081 |
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3 1/4 |
3.2500 |
4.713 |
4.875 |
5.373 |
5.629 |
2.749 |
2.877 |
1.748 |
1.814 |
0.087 |
0.075 |
0.087 |
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3 1/2 |
3.5000 |
5.075 |
5.250 |
5.786 |
6.062 |
2.964 |
3.100 |
1.870 |
1.943 |
0.094 |
0.081 |
0.094 |
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3 3/4 |
3.7500 |
5.438 |
5.625 |
6.199 |
6.495 |
3.178 |
3.322 |
1.990 |
2.072 |
0.100 |
0.087 |
0.100 |
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4 |
4.0000 |
5.800 |
6.000 |
6.612 |
6.928 |
3.393 |
3.545 |
2.112 |
2.201 |
0.107 |
0.093 |
0.107 |
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