Enhance the security of your fastening applications with our External Tooth Lock Washer. Designed for precision and reliability, this washer features a sturdy steel construction with a durable zinc finish coating. Its ASME B18.21.1 specification ensures quality performance, while its #6 hole size and .312 inch outside diameter make it compatible with a variety of bolts and screws. With a slim .02 inch thickness and an inside diameter of .146 inch, it provides a snug fit for optimal locking effectiveness. Rest assured, this washer is not only efficient but also environmentally friendly, as it complies with RoHS regulations. Upgrade your fastening system with this essential component for added peace of mind.