Ensure your fasteners stay securely in place with this Internal Tooth Lockwasher. Made of durable steel with a yellow zinc finish, it provides reliable protection against loosening due to vibrations. With an outside diameter of .373 inches and a thickness of .021 inches, it is designed for #8 hole sizes, with an inside diameter of .172 inches. This lockwasher is compliant with RoHS regulations, making it an environmentally friendly choice for your assembly needs. Trust in its quality and functionality for your industrial or DIY projects.