Enhance the security of your fastening applications with our External Tooth Lock Washer. This essential hardware component features a durable stainless steel construction, ensuring reliable performance in various environments. Compliant with ASME B18.21.1 specifications, it guarantees quality and precision. With an outside diameter of .522 inches and a thickness of .522 inches, it effectively distributes pressure to prevent loosening of bolts and screws. The toothed design provides a strong grip, offering added protection against vibration and movement. Designed for ease of installation, it has an inside diameter of .522 inches and a hole size of 1/2 inch. Rest assured, this washer is RoHS compliant, meeting international standards for environmental responsibility. Upgrade your assembly process with this indispensable component for secure and durable fastening solutions.