Secure your fasteners with ease using this Internal Tooth Lockwasher. Made from durable stainless steel, it provides reliable strength and corrosion resistance for long-lasting performance. With an outside diameter of .402 inches and a thickness of .021 inches, it offers a snug fit for #10 hole sizes. The internal teeth ensure a tight grip, preventing loosening due to vibrations or other external factors. Rest assured of its compliance with RoHS standards, making it a safe and environmentally friendly choice for your projects. Its precise dimensions, including an inside diameter of .199 inches, guarantee a secure and efficient fastening solution.