Flat Washer Type B Flat Washer Type Standard Dimensional Standards ASME B18.22.1 Material Stainless Steel Material Grade/Class 18-8 Finish Plain For Screw Size #10 Inside Diameter 0.203 in Outside Diameter 9/16 in Maximum Thickness 0.045 in System of Measurement Inch Minimum Thickness 0.036 in Color Silver Inside Diameter Tolerance +/-0.010 in Material Quality Standards ASTM A582 Outside Diameter Tolerance +/-0.010 in Pack Size Small Pack