The HEX NUT UNC ZINC 3/8"-16 GR 5 is a finished hex nut crafted from low carbon steel, ensuring strength and reliability in various applications. This nut is specifically designed for use with grade 5 bolts, providing a proof load of 120, making it ideal for medium-strength fastening needs in automotive and industrial environments. The zinc coating offers added corrosion resistance, enhancing durability and longevity in challenging conditions.