A spring washer is a type of fastener designed to provide tension and prevent loosening due to vibrations. Typically made from steel or other durable materials, it features a curved shape that allows it to compress when a bolt or screw is tightened, creating a spring effect. This helps maintain a secure connection between components in machinery or structural applications. Spring washers are commonly used in various industries, including automotive, aerospace, and construction, where reliability and safety are crucial. They are available in different sizes and designs, such as split, helical, or conical, to suit specific requirements.