A Washer features a flat, disk-shaped design with a central hole. It has a round outer diameter and a round or square inner diameter to accommodate the fastener. The thickness or height of a flat washer is generally uniform throughout. It provides a smooth interface between the fastener and the surface of the connected part, helping to prevent scratching, marring, or indentation.Attributes:• Prevents the fastener from loosening due to vibration or movement• Made of Aluminum which exhibits excellent corrosion resistanceApplications:A Washer is used to spread the clamping force of the fastener over a larger area, preventing damage to the mating surfaces by reducing pressure concentration.