The LOCK NUT NYLON UNC ZINC 5/16"-18 GR 2 features a hex design with a nylon-filled collar that grips the screw threads for enhanced security. Made from zinc-plated steel, this nut is resistant to corrosion, making it suitable for both automotive and industrial applications. Its 5/16"-18 UNC thread size ensures compatibility with standard bolts, providing reliable performance in high-vibration environments. This lock nut is essential for maintaining tight connections and preventing accidental loosening.