5/16"-18 Carriage Bolt Hot Dipped Galvanized

Hot Dipped Galvanized Carriage Bolts: Carriage bolts have a round smooth head with a square neck under the head. The square neck keeps the bolt from turning as a nut is tightened. These bolts are low carbon (Grade 2) steel. The Hot Dipped Galvanized coating is a thicker protective coating good for outdoor use, and recommended for use with treated lumber.  Please note you are buying by the pound so confirm your pieces when considering how much to purchase. (##) Number of pieces in 1 pound. Grade: Grade 2 Diameter: 5/16 Plating: Hot Dipped Galvanized Thread Count: 18 Material: Steel Thread Length: Threaded up to 6" Head Style: Carriage Socket Size: N/A Head Diameter: 0.688/0.719 Square Width 0.307/0.324 Proof Load, Lb.: 2,900 Tensile Strength, Lb.: 3,900 SAE J429 Proof Load and Tensile Strength Requirements Above Length is Measured from Under the Head to the Bottom of the Bolt Country of Origin varies; Country of Origin is subject to change If plating is important please