Enhance the security of your fastening applications with this Internal Tooth Lockwasher. Crafted from durable Stainless Steel, it offers reliable performance and corrosion resistance. With an outside diameter of 20.5 mm, inside diameter of 13 mm, and a thickness of 1 mm, it is designed to fit M12 hole sizes. Compliant with RoHS regulations, this lockwasher is a dependable choice for various industrial and mechanical uses. Its internal tooth design ensures a tight grip, preventing loosening of fasteners under vibration or movement. Trust in the quality and effectiveness of this essential component for maintaining the integrity of your assemblies.