Enhance the security of your fastening applications with our External Tooth Lock Washer. Designed to effectively prevent loosening and maintain tight connections, this washer is a crucial component in ensuring the durability and stability of your assembly. Made of durable steel with a thickness of .031 inches, it offers reliable performance in demanding environments. Its ASME B18.21.1 specification guarantees quality and compliance with industry standards. Featuring an outside diameter of .6 inches and an inside diameter of .326 inches, it is suitable for use with 5/16-inch hole sizes. Rest assured, this washer is also RoHS compliant, making it an environmentally friendly choice for your projects. Trust in the added security provided by our External Tooth Lock Washer for all your fastening needs.