A Spring lock washers is a type of washer that is designed to provide a secure hold and reduce friction between two surfaces. It is typically made of a flexible material, such as spring steel or plastic, and has a conical or tapered shape. The tapered shape allows the washer to compress slightly when it is tightened down, creating a spring-like action that helps to maintain a constant pressure on the fastener and the material being fastened. This helps to prevent loosening due to vibration or torque and can also reduce wear on the fastener and the surrounding components.
Most common grade used for split lock washer usage is din 127b . It comes with Rectangle/Flat section as both thickness and width have different dimensions.