Ensure maximum security and stability in your assemblies with this Internal Tooth Lockwasher. Made of durable stainless steel with a sleek black passivate finish, this washer provides reliable protection against loosening and vibration. With an outside diameter of .312 inches and a thickness of .02 inches, it is designed to fit #6 hole sizes perfectly. Its precise inside diameter of .146 inches guarantees a snug and secure fit, while its RoHS compliance ensures environmental sustainability. Trust in this essential component to keep your projects securely fastened.