Flat Washer Flat Washer Type Oversized Dimensional Standards ASME B18.22.1 Material Stainless Steel Material Grade/Class 18-8 Finish Plain For Screw Size #4 Inside Diameter 0.125 in Outside Diameter 1/4 in Maximum Thickness 0.063 in System of Measurement Inch Minimum Thickness 0.063 in Pack Size Small Pack Package Quantity 50