DIN 137 b Spring Wave Washers are a type of mechanical fastener designed to provide a spring force between two surfaces. They are characterized by a curved or waved profile that is designed to provide a spring action when compressed between two mating components. The wave profile is designed to absorb shock, reduce vibration, and dissipate energy. These washers are primarily made from metal, such as steel, stainless steel, or brass. They are used in a wide range of applications including automotive, aerospace, and construction.