Ensure secure fastening with this Internal Tooth Lockwasher. Made of durable steel with a yellow zinc coating, it offers reliable protection against corrosion. With an outside diameter of .252 inches and a thickness of .015 inches, it provides a perfect fit for your #4 hole. The internal tooth design adds extra grip, keeping your components firmly in place. ROHS compliant, this lockwasher meets environmental standards without compromising on performance. Trust in its quality for all your fastening needs.