17W01906 Flat Washer, Flat Washer Type Standard, Material Nylon, Material Grade/Class Grade 2, Finish Plain, For Screw Size #4, Inside Diameter 0.112 in, Outside Diameter 13/64 in, Maximum Thickness 0.053 in, System of Measurement Inch, Minimum Thickness 0.053 in, Color Off-White, Pack Size Small Pack, Resistance Properties Abrasion Resistant, Thickness Tolerance +/-0.005 in, Package Quantity 40