This Internal Tooth Lockwasher is an essential component for securing fasteners in place with optimal efficiency. Crafted from durable steel and coated with zinc for enhanced corrosion resistance, it ensures long-lasting performance in various applications. With an outside diameter of 1.6 inches and a thickness of .063 inches, it offers a reliable grip and stability. The precision-engineered design features internal teeth that bite into the mating surface, preventing loosening due to vibration or shifting. Its 1.04-inch inside diameter and hole size of 1 make it compatible with a wide range of bolts and screws. Trust in this lockwasher for robust and dependable fastening solutions, even in demanding environments. Please note that this product is not ROHS compliant.