This Internal Tooth Lockwasher is a vital component for secure fastening in various applications. Made of durable stainless steel with a black passivate finish, it offers reliable resistance to corrosion and wear. With an outside diameter of .252 inches and a thickness of .015 inches, it provides a snug fit for #4 hole sizes. The internal tooth design ensures a firm grip, preventing loosening due to vibration or movement. Compliant with RoHS regulations, this lockwasher is not only effective but also environmentally friendly. Trust in its quality to keep your assemblies securely in place.