External Tooth Lock Washer/External Tooth Washer
External Tooth Lock Washer/External Tooth Washer
External Tooth Lock Washer, also known as an external tooth washer, is a type of locking washer featuring serrated teeth around its outer edge. It is primarily used to increase friction between screws or nuts and the mating surface, preventing loosening.
The outer edge of the washer is equipped with multiple outward-extending serrated teeth that bite into the surface of the fastened material upon installation, enhancing anti-slip and locking effects.
The external tooth design provides a larger contact area with the mating surface, increasing friction and assisting in conductivity requirements.
Common materials include carbon steel, stainless steel, and phosphor bronze.
Surface treatments such as zinc plating, nickel plating, and black oxide are applied to improve corrosion resistance and durability.
Widely used in electronic devices, electrical components, automotive parts, and mechanical assemblies.
Particularly suitable for applications requiring good conductivity and resistance to vibration-induced loosening.
