... . ASTM A325 High Strength Structural Bolts Dimension 3/4", 5"Long, with Heavy Hex Nuts A563 and Plain Washers F436 Specification ... /2" 2.Grade: A3253.Material: Steel4.Standard:ASTM A 325 Type 15.Surface finishes: Zinc-plated(Black or Plain), Hot dip ... ASTM A325 High Strength Structural Bolts Dimension 3/4",5"Long, with Heavy Hex Nuts A563 and Plain Washers F436