ASTM A194 Nut Compatibility Chart
| Grade of Bolt | A194 Heavy Hex Nut Grade |
|---|---|
| A193 Grade B7 | 2H or 4 or 7 |
| A193 Grade B8 (Class 1 and 2) | 8 |
| A193 Grade B8M (Class 1 and 2) | 8M |
| A320 Grade L7 | 4 or 7 |
| A320 Grade B8 (Class 1 and 2) | 8 |
| A320 Grade B8M (Class 1 and 2) | 8M |
| A320 Grade B8C | 8C |
| A320 Grade B8T | 8T |
| A320 Grade B8LN | 8LN |
| A320 Grade B8MLN | 8MLN |
| For Class 2 stainless steel grades, strain hardened nuts available as a supplementary requirement | |