A490 Recommended Hardware
| Nuts | Washers | |||
|---|---|---|---|---|
| Type 1 | Type 3 | Type 1 | Type 3 | |
| A563DH | A563DH3 | F436-1 | F436-3 | |
|
Note: Nuts conforming to A194 Grade 2H are a suitable substitute for use with A490 heavy hex structural bolts. Follow the link for an ASTM A563 Nut Compatibility Chart. |
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