ASME B18.2.2 Heavy Hex Flat Nuts
| Nominal Size or Basic Major Dia. of Thread | Width Across FlatsF | Width Across CornersG | Thickness, Flat NutsH | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Basic | Max. | Min. | Max. | Min. | Basic | Max. | Min. | ||
| ASME B18.2.2 - 1 1⁄8 | 1.125 | 113⁄16 | 1.812 | 1.756 | 2.093 | 2.002 | 11⁄8 | 1.155 | 1.079 |
| ASME B18.2.2 - 1 1⁄4 | 1.25 | 2 | 2 | 1.938 | 2.309 | 2.209 | 11⁄4 | 1.282 | 1.187 |
| ASME B18.2.2 - 1 3⁄8 | 1.375 | 23⁄16 | 2.188 | 2.119 | 2.526 | 2.416 | 13⁄8 | 1.409 | 1.31 |
| ASME B18.2.2 - 1 1⁄2 | 1.5 | 23⁄8 | 2.375 | 2.3 | 2.742 | 2.622 | 11⁄2 | 1.536 | 1.433 |
| ASME B18.2.2 - 1 3⁄4 | 1.75 | 23⁄4 | 2.75 | 2.662 | 3.175 | 3.035 | 13⁄4 | 1.79 | 1.679 |
| ASME B18.2.2 - 2 | 2 | 31⁄8 | 3.125 | 3.025 | 3.608 | 3.449 | 2 | 2.044 | 1.925 |
| ASME B18.2.2 - 2 1⁄4 | 2.25 | 31⁄2 | 3.5 | 3.388 | 4.041 | 3.862 | 21⁄4 | 2.298 | 2.155 |
| ASME B18.2.2 - 2 1⁄2 | 2.5 | 37⁄8 | 3.875 | 3.75 | 4.474 | 4.275 | 21⁄2 | 2.552 | 2.401 |
| ASME B18.2.2 - 2 3⁄4 | 2.75 | 41⁄4 | 4.25 | 4.112 | 4.907 | 4.688 | 23⁄4 | 2.806 | 2.647 |
| ASME B18.2.2 - 3 | 3 | 45⁄8 | 4.625 | 4.475 | 5.34 | 5.102 | 3 | 3.06 | 2.893 |
| ASME B18.2.2 - 3 1⁄4 | 3.25 | 5 | 5 | 4.838 | 5.774 | 5.515 | 31⁄4 | 3.314 | 3.124 |
| ASME B18.2.2 - 3 1⁄2 | 3.5 | 53⁄8 | 5.375 | 5.2 | 6.207 | 5.928 | 31⁄2 | 3.568 | 3.37 |
| ASME B18.2.2 - 3 3⁄4 | 3.75 | 53⁄4 | 5.75 | 5.562 | 6.64 | 6.341 | 33⁄4 | 3.822 | 3.616 |
| ASME B18.2.2 - 4 | 4 | 61⁄8 | 6.125 | 5.925 | 7.073 | 6.755 | 4 | 4.076 | 3.862 |
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