Internal Tooth Lock Washer/Internal Tooth Washer
Internal Tooth Lock Washer/Internal Tooth Washer
Internal Tooth Lock Washer, also known as an internal tooth washer, is a type of washer with inward-facing serrations. It is primarily used to increase friction between the screw or nut and the mating surface, thereby preventing loosening.
The inner edge of the washer features serrated internal teeth, which bite into the contact surface upon installation to provide an anti-slip effect.
Commonly used with screws that have larger heads or in applications where space is limited.
The teeth extend inward and are not exposed, making them suitable for applications where appearance or safety is a concern.
Common materials include carbon steel, stainless steel, and phosphor bronze.
Surface treatments such as zinc plating, nickel plating, and black oxide are often applied to enhance corrosion resistance and durability.
Widely used in electronics, electrical devices, automotive components, and mechanical assemblies.
Particularly suitable for environments with frequent vibration or where a secure and stable connection is required.
