Back Home / Fasteners / Bolts / HEX CAP SCREW BOLT UNF ZINC 5/8″-18 X 5-1/2″, GR 5 HEX CAP SCREW BOLT UNF ZINC 5/8″-18 X 5-1/2″, GR 5 SKU: 58X512F Categories: Bolts, Fasteners Made from medium carbon steel. Heat treated. Tensile strength: 120,000 psi. minimum. Zinc plated. Unified screw threads :UNF. Diameter: 5/8″-18. Length: 5-1/2″. Made from medium carbon steel. Heat treated. Tensile strength: 120,000 psi. minimum. Zinc plated. Unified screw threads :UNF. Diameter: 5/8″-18. Lengt Case Quantity: 25 Log In For Pricing