1/2-13 x 11 A307 Grade A Carriage Bolt HDG .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.









