A194 Grades
| 2 | Carbon steel heavy hex nuts |
|---|---|
| 2H | Quenched & tempered carbon steel heavy hex nuts |
| 2HM | Quenched & tempered carbon steel heavy hex nuts, 100% hardness tested |
| 4 | Quenched & tempered carbon-molybdenum heavy hex nuts (withdrawn in 2017) |
| 7 | Quenched & tempered alloy steel heavy hex nuts |
| 7M | Quenched & tempered alloy steel heavy hex nuts, 100% hardness tested |
| 7L | Quenched & tempered alloy steel heavy hex nuts, Charpy impact tested |
| 8 | Stainless AISI 304 heavy hex nuts |
| 8M | Stainless AISI 316 heavy hex nuts |