Ensure secure fastening with this External Tooth Lock Washer. Crafted from durable Stainless Steel, this washer features an outside diameter of .89 inches and a thickness of .041 inches, meeting ASME B18.21.1 specifications. Its precise design includes an inside diameter of .522 inches, ideal for use with a 1/2-inch hole. Compliant with RoHS regulations, it guarantees both quality and environmental responsibility. Perfect for various industrial applications, this washer provides essential locking support for your assemblies.