Back Home / Fasteners / Nuts / HEX NUT UNC ZINC 1/2″-13 GR 5 HEX NUT UNC ZINC 1/2″-13 GR 5 SKU: N1213 Categories: Fasteners, Nuts A finished hex nut made from low carbon steel. For use with grade 5 bolts. Proof load: 120,000 psi. Size: 1/2″-13. Zinc plated. Case Quantity: 50 Log In For Pricing