Flat Washer, NAS620 Series, Carbon Steel, Standard Outside Diameter, Standard Thickness

Washers distribute the pressure of a fastener head evenly over a surface without damage. They also help ensure that the fastener is pressed against a smooth surface to reduce the chances of loosening over time. Flat washers protect surfaces by evenly distributing torque when a bolt or screw is tightened. They prevent corrosion between a steel screw and an aluminum surface. High carbon steel (HCS) is harder than plain carbon steel and has a high tensile strength. It is commonly used on wood, ferrous and non-ferrous metals.