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Technical Info

At Birmingham Fastener, we aim to provide you with the knowledge and tools for your project. View the F3125 Grade A325 / A490 Heavy Hex Bolt Nominal Dimensions (Inches).

F3125 Grade A325 and A490 Heavy Hex Bolt Nominal Dimensions (Inches)

Bolt Diameter Width Across Head Flats Bolt Head Height
1/2 7/8 5/16
5/8 1-1/16 25/64
3/4 1-1/4 15/32
7/8 1-9/16 35/64
1 1-5/8 39/64
1-1/8 1-13/16 11/16
1-1/4 2 25/32
1-3/8 2-3/16 27/32
1-1/2 2-3/8 15/16