Hex bolts are a commonly used fastener in the marine construction industry. Used in dock construction, fendering systems, cleats, and sometimes as an anchor bolt for bollards. They are typically hot-dip galvanized or stainless steel due to the corrosive environment in which they are used.
| Bolt Diameter | D | F | C | H | |||||
|---|---|---|---|---|---|---|---|---|---|
| Body Diameter | Width Across Flats | Width Across Corners | Height | ||||||
| Max | Basic | Max | Min | Max | Min | Basic | Max | Min | |
| 1⁄2 | 0.515 | 3⁄4 | 0.750 | 0.725 | 0.866 | 0.826 | 11⁄32 | 0.364 | 0.302 |
| 5⁄8 | 0.642 | 15⁄16 | 0.938 | 0.906 | 1.083 | 1.033 | 27⁄64 | 0.444 | 0.378 |
| 3⁄4 | 0.768 | 11⁄8 | 1.125 | 1.088 | 1.299 | 1.240 | 1⁄2 | 0.524 | 0.455 |
| 7⁄8 | 0.895 | 15⁄16 | 1.312 | 1.269 | 1.516 | 1.447 | 37⁄64 | 0.604 | 0.531 |
| 1 | 1.022 | 11⁄2 | 1.500 | 1.450 | 1.732 | 1.653 | 43⁄64 | 0.700 | 0.591 |
| 11⁄8 | 1.149 | 111⁄16 | 1.688 | 1.631 | 1.949 | 1.859 | 3⁄4 | 0.780 | 0.658 |
| 11⁄4 | 1.277 | 17⁄8 | 1.875 | 1.812 | 2.165 | 2.066 | 27⁄32 | 0.876 | 0.749 |
| 13⁄8 | 1.404 | 21⁄16 | 2.062 | 1.994 | 2.382 | 2.273 | 29⁄32 | 0.940 | 0.810 |
| 11⁄2 | 1.531 | 21⁄4 | 2.250 | 2.175 | 2.598 | 2.480 | 1 | 1.036 | 0.902 |
| 15⁄8 | 1.658 | 27⁄16 | 2.438 | 2.356 | 2.815 | 2.616 | 13⁄32 | 1.116 | 0.978 |
| 13⁄4 | 1.785 | 2-5/8 | 2.625 | 2.538 | 3.031 | 2.893 | 15⁄32 | 1.196 | 1.054 |
| 17⁄8 | 1.912 | 213⁄16 | 2.812 | 2.719 | 3.248 | 3.099 | 11⁄4 | 1.276 | 1.130 |
| 2 | 2.039 | 3 | 3.000 | 2.900 | 3.464 | 3.306 | 111⁄32 | 1.388 | 1.175 |
| 21⁄4 | 2.305 | 33⁄8 | 3.375 | 3.262 | 3.897 | 3.719 | 11⁄2 | 1.548 | 1.327 |
| 21⁄2 | 2.559 | 33⁄4 | 3.750 | 3.625 | 4.330 | 4.133 | 121⁄32 | 1.708 | 1.479 |
| Dimensions per ASME B18.2.1 | |||||||||