Large stock of heavy hex nuts.
Heavy hex nuts are used in a variety of applications with high strength bolts. They are both thicker and larger than finished hex nuts and come in a variety of grades and finishes.
Birmingham Fastener offers the following types of heavy hex nuts:
- A563 (Grades DH, A, and C)
- A194 (Grades 2H, 7, and 8)
Suitable Nuts for Use with ASTM A325 and A490 Bolts
| Nut Spec | A563 | A563 | A563 | A563 | A563 | A194 |
| Nut Grade | C | C3 | D | DH | DH3 | 2H |
| Bolt Spec and Type | ||||||
| A325, Type 1 | * | * | * | * | * | * |
| A325, Type 3 | * | * | ||||
| A325, Galvanized | * | * | ||||
| A490, Type 1 | * | * | * | |||
| A490, Type 3 | * |
