Hardened Steel Washer, Flat Washer Type Standard, Dimensional Standards ASTM F436, Material Steel, Material Grade/Class Grade 8, Finish Hot Dipped Galvanized, For Screw Size 5/8 in, Inside Diameter 0.688 in, Outside Diameter 1 5/16 in, Maximum Thickness 0.177 in, System of Measurement Inch, Minimum Thickness 0.122 in, Color White, Inside Diameter Tolerance -0 to +0.03125 in, Made in North America No, Manufacturer Location Globally Sourced, Material Quality Standards ASTM F436