Bolt Dimensions
SQUARE HEAD BOLT DIMENSIONS
| D | F | C | H | |
| Nominal | Max Body | Width Across | Width Across | Head Height |
| Diameter | Diameter | Flats Max | Corners Max | Max |
| 1/4" | 0.26 | 0.375 | 0.53 | 0.188 |
| 5/16" | 0.324 | 0.5 | 0.707 | 0.22 |
| 3/8" | 0.388 | 0.562 | 0.795 | 0.268 |
| 7/16" | 0.452 | 0.625 | 0.884 | 0.316 |
| 1/2" | 0.515 | 0.75 | 1.061 | 0.348 |
| 5/8" | 0.642 | 0.938 | 1.326 | 0.444 |
| 3/4" | 0.768 | 1.125 | 1.591 | 0.524 |
| 7/8" | 0.875 | 1.312 | 1.856 | 0.62 |
| 1" | 1.022 | 1.5 | 2.121 | 0.684 |
| 1-1/8" | 1.149 | 1.688 | 2.386 | 0.78 |
| 1-1/4" | 1.277 | 1.875 | 2.652 | 0.876 |
| 1-3/8" | 1.404 | 2.062 | 2.917 | 0.94 |