ASME B18.2.2 Square Nuts
| Nominal Size or Basic Major Dia. of Thread | Width Across Flats F | Width Across Corners G | Thickness H | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Basic | Max. | Min. | Max. | Min. | Basic | Max. | Min. | ||
| ASME B18.2.2 - 1⁄4 | 0.25 | 7⁄16 | 0.438 | 0.425 | 0.619 | 0.554 | 7⁄32 | 0.235 | 0.203 |
| ASME B18.2.2 - 5⁄16 | 0.3125 | 9⁄16 | 0.562 | 0.547 | 0.795 | 0.721 | 17⁄64 | 0.283 | 0.249 |
| ASME B18.2.2 - 3⁄8 | 0.375 | 5⁄8 | 0.625 | 0.606 | 0.884 | 0.802 | 21⁄64 | 0.346 | 0.31 |
| ASME B18.2.2 - 7⁄16 | 0.4375 | 3⁄4 | 0.75 | 0.728 | 1.061 | 0.97 | 3⁄8 | 0.394 | 0.356 |
| ASME B18.2.2 - 1⁄2 | 0.5 | 13⁄16 | 0.812 | 0.788 | 1.149 | 1.052 | 7⁄16 | 0.458 | 0.418 |
| ASME B18.2.2 - 5⁄8 | 0.625 | 1 | 1 | 0.969 | 1.414 | 35⁄64 | 0.569 | 0.525 | |
| ASME B18.2.2 - 3⁄4 | 0.75 | 1 1⁄8 | 1.125 | 1.088 | 1.591 | 1.464 | 21⁄32 | 0.68 | 0.632 |
| ASME B18.2.2 - 7⁄8 | 0.875 | 1 5⁄16 | 1.312 | 1.269 | 1.856 | 1.712 | 49⁄64 | 0.792 | 0.74 |
| ASME B18.2.2 - 1 | 1 | 1 1⁄2 | 1.5 | 1.45 | 2.121 | 1.961 | 7⁄8 | 0.903 | 0.847 |
| ASME B18.2.2 - 1 1⁄8 | 1.125 | 1 11⁄16 | 1.688 | 1.631 | 2.386 | 2.209 | 1 | 1.03 | 0.97 |
| ASME B18.2.2 - 1 1⁄4 | 1.25 | 1 7⁄8 | 1.875 | 1.812 | 2.652 | 2.458 | 13⁄32 | 1.126 | 1.062 |
| ASME B18.2.2 - 1 3⁄8 | 1.375 | 2 1⁄16 | 2.062 | 1.994 | 2.917 | 2.708 | 113⁄64 | 1.237 | 1.169 |
| ASME B18.2.2 - 1 1⁄2 | 1.5 | 2 1⁄4 | 2.25 | 2.175 | 3.182 | 2.956 | 15⁄16 | 1.348 | 1.276 |
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