USS Washer, Flat Washer Type USS, Dimensional Standards ASME B18.21.1, Material Steel, Material Grade/Class Through Hardened, Finish Zinc Yellow, For Screw Size 7/16 in, Inside Diameter 0.5 in, Outside Diameter 1 1/4 in, Maximum Thickness 7/64 in, System of Measurement Inch, Minimum Thickness 1/16 in, Color Yellow, Inside Diameter Tolerance 0.495-0.515, Made in North America Not Made in North America, Manufacturer Location Globally Sourced, Material Quality Standards ASTM A-325