Steel Hex Bolt Grades
Note, if the bolt is blank and doesn't have a manufactuer marking on this list. It's best to assume that it doesn't meet any specification. If it has a manufactuer marking that's on this list than it probably meets the grade 2 specifications.
| Specification Body | Specification | Grade | Marking | Martensitic |
|---|---|---|---|---|
| SAE | J429 | 1 |  | No |
| SAE | J429 | 2 | ||
| ASTM | A307 | A |  | |
| SAE | J429 | 5 |  | No |
| ASTM | A449 | 1 | ||
| SAE | J429 | 5.2 |  | Yes |
| ASTM | A449 | 2 | ||
| SAE | J429 | 7 |  | No |
| SAE | J429 | 8 |  | No |
| SAE | J429 | 8.2 |  | Unknown |
| ASTM | A354 | BD |  | No |
