Flat Washer Flat Washer Type Standard Material Nylon Material Grade/Class Grade 2 Finish Plain For Screw Size #6 Inside Diameter 0.162 in Outside Diameter 5/16 in Maximum Thickness 0.062 in System of Measurement Inch Minimum Thickness 0.062 in Color Off-White Pack Size Small Pack Resistance Properties Abrasion Resistant Thickness Tolerance +/-0.005 in Package Quantity 40