Enhance the security of your fastening system with our External Tooth Lock Washer, a vital component for preventing loosening and ensuring lasting stability. Crafted from durable Phosphor Bronze with a thickness of .02 inches, this washer is designed to withstand rigorous conditions and maintain its integrity over time. Compliant with ASME B18.21.1 specifications, it guarantees high performance and reliability. With an outside diameter of .312 inches and an inside diameter of .146 inches, it is specifically engineered to fit #6 hole sizes. Trust in its exceptional quality and precision engineering to elevate the efficiency and durability of your assemblies.