Back Home / Fasteners / Nuts / HEX NUT UNC ZINC 5/16″-18 GR 8 HEX NUT UNC ZINC 5/16″-18 GR 8 SKU: 8N5618 Categories: Fasteners, Nuts A finished hex nut made from low carbon steel. For use with grade 8 bolts. Proof load: 150,000 psi. Size: 5/16″-18. Yellow zinc plated. Case Quantity: 100 Log In For Pricing