| Nominal Size Inch |
Basic Major Thread Diameter |
Width Across Flats, F | Width Across Corners, G | Thickness Hex Nuts, H | |||
|---|---|---|---|---|---|---|---|
| Min. | Max. | Min. | Max. | Min. | Max. | ||
| 1/4 | 0.25 | 0.428 | 0.438 | 0.488 | 0.505 | 0.212 | 0.226 |
| 5/16 | 0.3125 | 0.489 | 0.500 | 0.557 | 0.577 | 0.258 | 0.273 |
| 3/8 | 0.375 | 0.551 | 0.563 | 0.628 | 0.650 | 0.320 | 0.337 |
| 7/16 | 0.4375 | 0.675 | 0.688 | 0.768 | 0.794 | 0.365 | 0.385 |
| 1/2 | 0.50 | 0.736 | 0.750 | 0.840 | 0.866 | 0.427 | 0.448 |
| 9/16 | 0.5625 | 0.861 | 0.875 | 0.982 | 1.010 | 0.473 | 0.496 |
| 5/8 | 0.625 | 0.922 | 0.938 | 1.051 | 1.083 | 0.535 | 0.559 |
| 3/4 | 0.75 | 1.088 | 1.125 | 1.240 | 1.299 | 0.617 | 0.665 |
| 7/8 | 0.875 | 1.269 | 1.312 | 1.447 | 1.516 | 0.724 | 0.776 |
| 1 | 1.00 | 1.450 | 1.500 | 1.653 | 1.732 | 0.831 | 0.887 |
| 1 1/8 | 1.125 | 0.631 | 1.688 | 1.859 | 1.949 | 0.939 | 0.999 |
| 1 1/4 | 1.25 | 1.812 | 1.875 | 2.066 | 2.165 | 1.030 | 1.094 |
| 1 3/8 | 1.375 | 1.994 | 2.062 | 2.273 | 2.382 | 1.138 | 1.206 |
| 1 1/2 | 1.50 | 2.175 | 2.250 | 2.480 | 2.598 | 1.245 | 1.317 |
| 1 5/8 | 1.625 | 2.350 | 2.430 | 2.679 | 2.805 | 1.364 | 1.416 |
| 1 3/4 | 1.75 | 2.538 | 2.625 | 2.893 | 3.031 | 1.460 | 1.540 |
| 1 7/8 | 1.875 | 2.722 | 2.813 | 3.103 | 3.247 | 1.567 | 1.651 |
| 2 | 2.00 | 2.900 | 3.000 | 3.306 | 3.464 | 1.675 | 1.763 |
| 2 1/4 | 2.25 | 3.263 | 3.375 | 3.719 | 3.897 | 1.890 | 1.986 |
| 2 1/2 | 2.50 | 3.625 | 3.750 | 4.133 | 4.330 | 2.105 | 2.209 |
| 2 3/4 | 2.75 | 3.988 | 4.125 | 2.622 | 2.742 | 1.433 | 1.505 |
| 3 | 3.00 | 4.350 | 4.500 | 4.959 | 5.196 | 2.534 | 2.654 |
| 3 1/4 | 3.25 | 4.713 | 4.875 | 5.373 | 5.629 | 2.749 | 2.877 |
| 3 1/2 | 3.50 | 5.075 | 5.250 | 5.786 | 6.062 | 2.964 | 3.100 |
| 3 3/4 | 3.75 | 5.438 | 5.625 | 6.199 | 6.495 | 3.178 | 3.322 |
| 4 | 4.50 | 5.800 | 6.000 | 6.612 | 6.928 | 3.393 | 3.545 |