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Structural Bolt
A type of hex bolt that features a larger hex head for heavy duty applications. Commonly used in structural steel joints in buildings.
The most common types are covered by ASTM A325 and ASTM A490.
Dimensions - A325 / A490
ASME B18.2.6
| Thread Dia. | Hex - Across Flats | Head Height | Thread Length |
|---|---|---|---|
| 1/2 | 7/8 | 5/16 | 1 |
| 5/8 | 1 1/16 | 25/64 | 1 1/4 |
| 3/4 | 1 1/4 | 15/32 | 1 3/8 |
| 7/8 | 1 7/16 | 35/64 | 1 1/2 |
| 1 | 1 5/8 | 39/64 | 1 3/4 |
| 1 1/8 | 1 13/16 | 11/16 | 2 |
| 1 1/4 | 2 | 25/32 | 2 |
| 1 3/8 | 2 3/16 | 27/32 | 2 1/4 |
| 1 1/2 | 2 3/8 | 15/16 | 2 1/4 |
*ASTM A325 and A490 only