Ensure the utmost security for your fasteners with this Internal Tooth Lockwasher. Crafted from durable Phosphor Bronze, it boasts a precise outside diameter of .252 inches and a thickness of .015 inches, making it ideal for #4 hole sizes. With an inside diameter of .119 inches, it guarantees a snug fit, while its compliance with RoHS regulations underscores its commitment to environmental responsibility. Trust in this essential component to maintain the integrity of your assemblies with ease and reliability.