ASME B18.2.2 Heavy Hex Jam Nuts
| Nominal Size or Basic Major Dia. of Thread | Width Across Flats F | Width Across Corners G | Thickness Hex Jam Nuts H1 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Basic | Max. | Min. | Max. | Min. | Basic | Max. | Min. | ||
| ASME B18.2.2 - 1⁄4 | 0.25 | 1⁄2 | 0.5 | 0.488 | 0.577 | 0.556 | 11⁄64 | 0.188 | 0.156 |
| ASME B18.2.2 - 5⁄16 | 0.3125 | 9⁄16 | 0.562 | 0.546 | 0.65 | 0.622 | 13⁄64 | 0.22 | 0.186 |
| ASME B18.2.2 - 3⁄8 | 0.375 | 11⁄16 | 0.688 | 0.669 | 0.794 | 0.763 | 15⁄64 | 0.252 | 0.216 |
| ASME B18.2.2 - 7⁄16 | 0.4375 | 3⁄4 | 0.75 | 0.728 | 0.866 | 0.83 | 17⁄64 | 0.285 | 0.247 |
| ASME B18.2.2 - 1⁄2 | 0.5 | 7⁄8 | 0.875 | 0.85 | 1.01 | 0.969 | 19⁄64 | 0.317 | 0.277 |
| ASME B18.2.2 - 9⁄16 | 0.5625 | 15⁄16 | 0.938 | 0.909 | 1.083 | 1.037 | 21⁄64 | 0.349 | 0.307 |
| ASME B18.2.2 - 5⁄8 | 0.625 | 11⁄16 | 1.062 | 1.031 | 1.227 | 1.1175 | 23⁄64 | 0.381 | 0.337 |
| ASME B18.2.2 - 3⁄4 | 0.75 | 11⁄4 | 1.25 | 1.212 | 1.443 | 1.382 | 27⁄64 | 0.446 | 0.398 |
| ASME B18.2.2 - 7⁄8 | 0.875 | 17⁄16 | 1.438 | 1.394 | 1660 | 1.589 | 31⁄64 | 0.51 | 0.458 |
| ASME B18.2.2 - 1 | 1 | 15⁄8 | 1.625 | 1.575 | 1.876 | 1.796 | 35⁄64 | 0.575 | 0.519 |
| ASME B18.2.2 - 1 1⁄8 | 1.125 | 113⁄16 | 1.812 | 1.756 | 2.093 | 2.002 | 39⁄64 | 0.639 | 0.579 |
| ASME B18.2.2 - 1 1⁄4 | 1.25 | 2 | 2 | 1.938 | 2.309 | 2.209 | 23⁄32 | 0.751 | 0.687 |
| ASME B18.2.2 - 13⁄8 | 1.375 | 23⁄16 | 2.188 | 2.119 | 2.526 | 2.416 | 25⁄32 | 0.815 | 0.747 |
| ASME B18.2.2 - 1 1⁄2 | 1.5 | 23⁄8 | 2.375 | 2.3 | 2.742 | 2.622 | 27⁄32 | 0.88 | 0.808 |
| ASME B18.2.2 - 15⁄8 | 1.625 | 29⁄16 | 2.562 | 2.481 | 2.959 | 2.828 | 29⁄32 | 0.944 | 0.868 |
| ASME B18.2.2 - 1 3⁄4 | 1.75 | 23⁄4 | 2.75 | 2.662 | 3.175 | 3.035 | 31⁄32 | 1.009 | 0.929 |
| ASME B18.2.2 - 1 7⁄8 | 1.875 | 215⁄16 | 2.938 | 2.844 | 3.392 | 3.242 | 11⁄32 | 1.073 | 0.989 |
| ASME B18.2.2 - 2 | 2 | 31⁄8 | 3.125 | 3.025 | 3.608 | 3.449 | 13⁄32 | 1.138 | 1.05 |
| ASME B18.2.2 - 21⁄4 | 2.25 | 31⁄2 | 3.5 | 3.388 | 4.041 | 3.862 | 113⁄64 | 1.251 | 1.155 |
| ASME B18.2.2 - 2 1⁄2 | 2.5 | 37⁄8 | 3.875 | 3.75 | 4.474 | 4.275 | 129⁄64 | 1.505 | 1.401 |
| ASME B18.2.2 - 2 3⁄4 | 2.75 | 41⁄4 | 4.25 | 4.112 | 4.907 | 4.688 | 137⁄64 | 1.634 | 1.522 |
| ASME B18.2.2 - 3 | 3 | 45⁄8 | 4.625 | 4.475 | 5.34 | 5.102 | 145⁄64 | 1.763 | 1.643 |
| ASME B18.2.2 - 3 1⁄4 | 3.25 | 5 | 5 | 4.838 | 5.774 | 5.515 | 113⁄16 | 1.876 | 1.748 |
| ASME B18.2.2 - 3 1⁄2 | 3.5 | 53⁄8 | 5.375 | 5.2 | 6.207 | 5.928 | 115⁄16 | 2.006 | 1.87 |
| ASME B18.2.2 - 3 3⁄4 | 3.75 | 53⁄4 | 5.75 | 5.562 | 6.64 | 6.341 | 21⁄16 | 2.134 | 1.99 |
| ASME B18.2.2 - 4 | 4 | 61⁄8 | 6.125 | 5.925 | 7.073 | 6.755 | 23⁄16 | 2.264 | 2.112 |