Precise Dimensions: The double-layer self-locking washers have an M6/M8M10 inner diameter, an outer diameter of 10.8/13.5/16.6mm, and a thickness of 2/2/2.5mm. Enhanced Stability: Unlike traditional washers that rely on friction, these double-layer washers use tension to secure bolts subjected to severe vibrations and dynamic loads. This design helps distribute the pressure from the nut and bolt head, significantly reducing the likelihood of loosening due to uneven surfaces. Wide Range of Applications: Wedge-locking washers are ideal for various industries, including household furniture, construction and bridge building, manufacturing and processing, shipbuilding, forestry and agriculture, and heavy-duty vehicles. Manganese Steel Construction: Made fro.