The Tinnerman Palnut Locknut 1/4 ScrSz #4-40 with 1 notch in zinc finish by G L Huyett is engineered for secure fastening in various applications. This locknut features a unique design that provides a reliable grip, preventing loosening under vibration. Its zinc finish offers corrosion resistance, ensuring longevity in demanding environments. Ideal for use in automotive, industrial, and electronic applications, this locknut meets industry standards for quality and performance, making it an essential component for your fastening needs.