Structural bolts are almost always used in bolting high strength structural steel joints together. Typically, they are used in bridge and building construction. Due to these applications, ASTM and IFI standards have very hign specifications on tolerances (for example the dimensional and physical compositions). 

Structural bolt assemblies include: a heavy hex head bolt, a hardened washer and a heavy hex nut. 

Common Grades: A325, A490 and bolt in Type 3 Weathering Steel 

Lengths: 1/2″ to 1-1/2″ diameter 

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