Birmingham Fastener carries F3125 A325 and A490 TC Bolts in the following dimensions. If you have any questions, please contact our sales team.
| Diameter of Bolt | Bearing Surface Diameter | Bolt Head Height (max) | Bolt Head Height (min) | Length of Spline | Diameter of Spline Reference |
| 5/8 | 1.102 | .403 | .378 | .60 | .43 |
| 3/4 | 1.338 | .483 | .455 | .65 | .53 |
| 7/8 | 1.535 | .563 | .531 | .72 | .61 |
| 1 | 1.771 | .627 | .591 | .80 | .70 |
| 1 1/8 | 1.991 | .718 | .658 | .90 | .80 |