The G L Huyett Tinnerman Lock-Nut Hex Screw Size 5/16-18 is designed for secure fastening in various applications. This lock-nut features a zinc finish for enhanced corrosion resistance, making it suitable for both indoor and outdoor use. With a 5/16-18 thread size and a 1/2 inch drive, it is compatible with standard fasteners, ensuring a reliable fit. Ideal for use in automotive and machinery applications, this lock-nut provides a strong and stable connection, essential for maintaining the integrity of your assemblies.