Ensure a secure fastening with this Internal Tooth Lockwasher. Crafted from durable stainless steel with a black oxide finish coating, it offers reliable strength and corrosion resistance. The precise dimensions, with an outside diameter of .252 inches and a thickness of .015 inches, make it ideal for use with #4 hole sizes. Featuring an inside diameter of .119 inches, it provides a snug fit for optimal performance. Compliant with RoHS standards, this lockwasher is a dependable choice for various applications.