5/16-18 Hex Nut / Grade 5 / Coarse (UNC) / Zinc Plated

A finished, heat treated hex nut made from steel with a maximum carbon content of 0.55%, minimum manganese content of 0.30%, and a maximum sulfur content of 0.15% (Standard Grade 5 hex nut). For use with bolts with a minimum tensile strength equal to or less than 120,000 PSI. HN516C5