Enhance the security of your fastening applications with our External Tooth Lock Washer. This essential component, crafted from durable steel with a protective phosphorus coating, ensures reliable performance and longevity. Compliant with ASME B18.21.1 standards, it features an outside diameter of .501 inches and a thickness of .025 inches, making it suitable for 1/4 inch hole sizes. The precise design, with an inside diameter of .262 inches, guarantees a perfect fit. Trust in its robust construction to prevent loosening and maintain the integrity of your assemblies. Rest assured, it is also RoHS compliant, meeting environmental regulations for added peace of mind. Elevate your fastening solutions with this high-quality External Tooth Lock Washer.