Introducing our External Tooth Lock Washer, a crucial component for secure fastening in various applications. Crafted from durable stainless steel, this washer ensures reliable performance in demanding environments. With an ASME B18.21.1 specification, it meets stringent quality standards. The precise .402-inch outside diameter and .021-inch thickness provide a perfect fit for #10 hole sizes. Featuring external teeth for enhanced grip, this washer effectively prevents loosening and vibration. Rest assured, it complies with RoHS regulations, making it an environmentally conscious choice. Trust in the durability and functionality of this essential hardware for your projects.