SAE Washer, Flat Washer Type SAE, Dimensional Standards ASME B18.21.1, Material Steel, Material Grade/Class Through Hardened, Finish Zinc Yellow, For Screw Size 5/16 in, Inside Diameter 0.344 in, Outside Diameter 11/16 in, Maximum Thickness 5/64 in, System of Measurement Inch, Minimum Thickness 3/64 in, Color Yellow, Inside Diameter Tolerance 0.339-0.359, Made in North America Not Made in North America, Manufacturer Location Globally Sourced, Material Quality Standards ASTM A-325