Flat Washer Flat Washer Type Standard Dimensional Standards ASME B18.21.1-2009 (R2016) Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size 9/16 in Inside Diameter 0.594 in Outside Diameter 1 3/16 in Maximum Thickness 0.094 in System of Measurement Inch Minimum Thickness 0.094 in Color Silver Pack Size Small Pack RoHS Compliant Yes Package Quantity 215