Fender Washer Flat Washer Type Oversized Dimensional Standards ASME B18.22.1 Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size #10 Inside Diameter 0.219 in Outside Diameter 1 1/2 in Maximum Thickness 0.065 in System of Measurement Inch Minimum Thickness 0.036 in Color Silver Inside Diameter Tolerance +/-0.010 in Outside Diameter Tolerance +/-0.010 in Pack Size Small Pack Rockwell Hardness B55 Thickness Tolerance +0.005/-0.004 in Package Quantity 10