Enhance the security of your fastening applications with our Internal Tooth Lockwasher. Crafted from durable Silicone Bronze, this essential component features a .031-inch thickness, ensuring reliable performance. With an outside diameter of .6 inches and an inside diameter of .326 inches, it is designed to perfectly fit a 5/16-inch hole size. Trust in its quality construction for dependable locking capabilities, ideal for a wide range of industrial and DIY projects. Rest assured, this product is not only functional but also environmentally conscious, as it complies with RoHS standards. Elevate the integrity of your assemblies with this essential hardware component.