High strength bolts or structural bolts are
made to be used with heavy hex nuts to connect structural members. To be
considered a structural connection, it has to conform to specific ASTM
standards; specifically, ASTM A563 or ASTM A194.
Structural bolts are also
categorized by grades. The grading system takes into consideration the bolt’s
material, its size range, its proof load, the minimum yield strength, and the
minimum tensile strength.
Diameter Metric: M12 - M48
Length length upto 10