5/16-18 x 5 1/2 A307 Grade A Carriage Bolt Zinc Plated
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5/16-18 x 5 1/2 A307 Grade A Carriage Bolt Zinc Plated . A307 Grade A Carriage Bolts are manufactured from low carbon steel to meet or exceed ASTM A307 Grade A. Material is manufactured with rolled threads. Lengths out to 6 inches will be fully threaded. Lengths over 6 to 12 inches will have 6 inches of thread. Zinc plated material will meet or exceed ASTM F1941. Hot-Dip Galvanized material will meet or exceed ASTM A153. Typical hardness will range from HRB 69-100 and a minimum tensile strength of 60,000 psi is required.
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All of our item images are accurate representative images of the product category, however, due to the limitless variations in thread patterns, finishes, and other variables that exist with fasteners, bits and cutting tools, they are representative images only.