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 7/8 in Inside Diameter 0.938 in Outside Diameter 1 3/4 in Maximum Thickness 0.177 in System of Measurement Inch Minimum Thickness 0.136 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