A307 Grades
| A |
 |
Headed bolts, threaded rods and bent bolts intended for general applications. |
| B |
 |
Heavy hex bolts and studs intended for flanged joints in piping systems with cast iron flanges. |
| C* |
 |
Nonheaded anchor bolts, either bent or straight, intended for structural anchorage purposes. The end of a grade C anchor bolt intended to project from the concrete will be painted green for identification purposes. Permanent marking is a supplemental requirement. *As of August 2007, grade C has been replaced by specification F1554 grade 36. We will continue to supply grade C, if required by the project. |
