Back Home / Fasteners / Bolts / CARRIAGE BOLT UNC ZINC 3/8″-16 X 1″ GR A CARRIAGE BOLT UNC ZINC 3/8″-16 X 1″ GR A SKU: X38X1CB Categories: Bolts, Fasteners Made from low or medium carbon steel. Round head bolt with a square neck under the head. The square neck is designed to keep the bolt from turning as the nut is tightened. Zinc plated. Tensile strength: 60,000 psi minimum. Unified screw threads: UNC. Diameter: 3/8″-16. Length: 1″. Case Quantity: 100 Log In For Pricing