Enhance the security of your fastening applications with this External Tooth Lock Washer. Crafted from durable steel with a zinc finish coating, it offers reliable protection against loosening and vibration. Designed to ASME B18.21.1 specifications, this washer features an outside diameter of 2.185 inches, a thickness of .064 inches, and an inside diameter of 1.28 inches. Its unique external tooth design provides a strong grip, ensuring optimal performance. Suitable for hole sizes of 1-1/4 inches, this washer is a essential component for industrial and construction projects. Note that it does not comply with RoHS regulations. Trust in the quality and functionality of this External Tooth Lock Washer for your assembly needs.