The LOCK NUT NC NYLON INSERT KIT from DOUBLE HH MANUFACTURING includes 51 pieces of nylon insert lock nuts, designed to provide secure fastening in various applications. These lock nuts feature a non-corrosive finish and are available in multiple sizes, ensuring compatibility with a wide range of bolts and screws. The nylon insert prevents loosening due to vibration, making them ideal for automotive, agricultural, and industrial uses. This kit meets industry standards for quality and reliability, providing a comprehensive solution for your fastening needs.