Enhance the security of your fastening applications with our External Tooth Lock Washer. Designed to ensure a tight grip and prevent loosening, this washer is a reliable choice for industrial and construction projects. Made of durable steel with a yellow zinc finish coating, it offers both strength and corrosion resistance. With an outside diameter of .522 inches and a thickness of .522 inches, it fits perfectly with 1/2 inch hole sizes. Compliant with ASME B18.21.1 standards and RoHS regulations, this washer guarantees quality and environmental responsibility. Upgrade your fastening system with this essential component for optimal performance and peace of mind.