Enhance the security of your fastening system with our External Tooth Lock Washer. Crafted from durable 400 Series Stainless Steel, this washer ensures reliable performance in demanding environments. Compliant with ASME B18.21.1 specifications, it features an outside diameter of .6 inches and a thickness of .031 inches, making it suitable for a range of applications. The precise inside diameter of .326 inches and hole size of 5/16 guarantee a secure fit. With its RoHS compliance, you can trust in both the quality and environmentally conscious design of this essential component. Upgrade your assembly process with the assurance of enhanced safety and stability.