Enhance the security of your fastening applications with our External Tooth Lock Washer. Crafted from durable steel with a resilient yellow zinc finish coating, this washer ensures long-lasting protection against corrosion. Designed to ASME B18.21.1 specifications, it features an outside diameter of .6 inches and a thickness of .031 inches, with an inside diameter of .326 inches. The washer type, External Tooth, offers reliable grip and stability, while its hole size of 5/16 inches accommodates various screws and bolts. Rest assured of its environmental compliance with RoHS standards. Upgrade your assembly with this essential component for optimal performance and peace of mind.