Fender Washer Flat Washer Type Oversized Dimensional Standards ASME B18.21.1 Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size 1/4 in Inside Diameter 0.281 in Outside Diameter 2 in Maximum Thickness 0.065 in System of Measurement Inch Minimum Thickness 0.065 in Pack Size Small Pack Thickness Tolerance 0.047 in to 0.080 in Package Quantity 100