Correct option is C
Spring washers are designed to provide axial flexibility and prevent loosening of fasteners due to vibration, shock, or dynamic loads. They apply constant tension on the fastener, ensuring that it remains tight even in high-vibration environments.
· They work by compressing under load, creating elastic force that resists loosening.
· Spring washers are commonly used in automotive, aerospace, and mechanical assemblies where vibration resistance is critical.
· Examples include Belleville washers, wave washers, and helical spring washers.
