| Nominal Size Inch |
Basic Major Thread Diameter |
Width Across Flats, F | Width Across Corners, G | Thickness Hex Jam Nuts, H1 | |||
|---|---|---|---|---|---|---|---|
| Min. | Max. | Min. | Max. | Min. | Max. | ||
| 1/4 | 0.25 | 0.428 | 0.438 | 0.488 | 0.505 | 0.150 | 0.163 |
| 5/16 | 0.3125 | 0.489 | 0.500 | 0.557 | 0.577 | 0.180 | 0.195 |
| 3/8 | 0.375 | 0.551 | 0.563 | 0.628 | 0.650 | 0.210 | 0.227 |
| 7/16 | 0.4375 | 0.675 | 0.688 | 0.768 | 0.794 | 0.240 | 0.260 |
| 1/2 | 0.50 | 0.736 | 0.750 | 0.840 | 0.866 | 0.302 | 0.323 |
| 9/16 | 0.5625 | 0.861 | 0.875 | 0.982 | 1.010 | 0.301 | 0.324 |
| 5/8 | 0.625 | 0.922 | 0.938 | 1.051 | 1.083 | 0.363 | 0.387 |
| 3/4 | 0.75 | 1.088 | 1.125 | 1.240 | 1.299 | 0.398 | 0.446 |
| 7/8 | 0.875 | 1.269 | 1.312 | 1.447 | 1.516 | 0.458 | 0.510 |
| 1 | 1.00 | 1.450 | 1.500 | 1.653 | 1.732 | 0.519 | 0.575 |
| 1 1/8 | 1.125 | 0.631 | 1.688 | 1.859 | 1.949 | 0.579 | 0.639 |
| 1 1/4 | 1.25 | 1.812 | 1.875 | 2.066 | 2.165 | 0.687 | 0.751 |
| 1 3/8 | 1.375 | 2.994 | 2.062 | 2.273 | 2.382 | 0.747 | 0.815 |
| 1 1/2 | 1.50 | 2.175 | 2.250 | 2.480 | 2.598 | 0.808 | 0.880 |
| 1 5/8 | 1.625 | 2.350 | 2.430 | 2.679 | 2.805 | 0.868 | 0.944 |
| 1 3/4 | 1.75 | 2.538 | 2.625 | 2.893 | 3.031 | 0.929 | 1.009 |
| 1 7/8 | 1.875 | 2.722 | 2.813 | 3.103 | 3.247 | 0.989 | 1.009 |
| 2 | 2.00 | 2.900 | 3.000 | 3.306 | 3.464 | 1.105 | 1.138 |
| 2 1/4 | 2.25 | 3.263 | 3.375 | 3.719 | 3.897 | 1.155 | 1.267 |
| 2 1/2 | 2.50 | 3.625 | 3.750 | 4.133 | 4.330 | 1.401 | 1.427 |
| 2 3/4 | 2.75 | 3.988 | 4.125 | 2.622 | 2.742 | 0.808 | 0.880 |
| 3 | 3.00 | 4.350 | 4.500 | 4.959 | 5.196 | 1.643 | 1.685 |
| 3 1/4 | 3.25 | 4.713 | 4.875 | 5.373 | 5.629 | 1.748 | 1.814 |
| 3 1/2 | 3.50 | 5.075 | 5.250 | 5.786 | 6.062 | 1.870 | 1.943 |
| 3 3/4 | 3.75 | 5.438 | 5.625 | 6.199 | 6.495 | 1.990 | 2.072 |
| 4 | 4.50 | 5.800 | 6.000 | 6.612 | 6.928 | 2.112 | 2.201 |