A325 Structural Bolt

A heavy hex bolt made of alloy steel. The bearing surface shall be flat and washer-faced, and the point is chamfered. Used in structural steel joints in heavy construction when greater yield and tensile strengths than those of an A325 bolt are required. These bolts use the same material as their common cousins (ASTM F568M for metric bolts), but have a thicker and wider head to more effectively distribute the load. ASTM A325 bolts can be considered equivalent to Grade 8.8 bolts.

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Standard Specifications

Standard Specifications


Black or Hot Dip Galvanized



Tensile Strength

Min. 830 MPa

Yield Strength

Min. 660 MPa

Min. Elongation %


Min. Reduction Area %


Sizes (Available on various length half thread or full thread)




1 1/8"

1 3/8"




1 1/4"

1 1/2"

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