Internal/External Toothed Lock Washer

An external tooth lock washer is a type of anti-loosening washer featuring outward-facing teeth. It is widely used in screw fastening applications, especially under conditions involving vibration, impact, or rotation, to prevent screws and nuts from loosening.

The AW-type internal tooth lock washer is an anti-loosening washer with an internal tooth design, used to prevent screws or nuts from loosening due to vibration or rotation. It is commonly found in precision machinery, electronic devices, and the automotive industry.