Enhance the security of your fastening applications with this Internal Tooth Lockwasher. Made from durable steel with a sleek black oxide finish, it provides reliable protection against loosening and vibration. Its precise design features an outside diameter of .501 inches and a thickness of .025 inches, ensuring a snug fit. The inside diameter of .262 inches accommodates a 1/4-inch hole size. Compliant with RoHS standards, it is both high-performing and environmentally friendly. Upgrade your assembly process with this essential component.