5/16-18X1 3/4 Carriage Bolt Grade 8 Fully Threaded Zinc Yellow (Pack Qty 800) BC-3128C8

Low Carbon Steel Carriage: The square neck is designed to keep the bolt from turning as a nut is tightened. Hot-Dip Galvanized Steel Carriage: Same design advantages as a low carbon carriage bolt but with a thicker protective coating for outdoor use. Often used in outdoor furniture Low Carbon Steel & Hot-Dip Galvanized Steel Carriage: AISI 1006 - 1050 or equivalent steel used to fasten metal to metal or metal to wood