Marking required in ASTM A193/A320 for bolt and ASTM A94 for Nut.
General requirement in ASTM A962.
[1] Manufacturer’s identification symbols
[2] Grade symbols
| # | Material Specification | Markings Symbols |
| 1 | ASTM A193 Grade B7 | B7 |
| 2 | ASTM A193 Grade B16 | B16 |
| 3 | ASTM A193 Grade B8 Cl. 2 | B8SH |
| 4 | ASTM A320 Grade L7 | L7 |
| 5 | ASTM A193 Grade 2H | 2H or 2HB |
| 6 | ASTM A193 Grade 7 | 7 or 7B |
| 7 | ASTM A193 Grade 8 | 8 or 8B |
See other Material Markings.
