Flat Washer, Flat Washer Type Standard, Dimensional Standards ANSI B 18.22. 1, Material Stainless Steel, Material Grade/Class 18-8, Finish NL-19, For Screw Size 1/4 in, Inside Diameter 0.281 in, Outside Diameter 5/8 in, Maximum Thickness 0.045 in, System of Measurement Inch, Minimum Thickness 0.045 in, Color Silver, Material Quality Standards Not Applicable, Pack Size Small Pack, Resistance Properties Corrosion-Resistant, Rockwell Hardness B70, Thickness Tolerance +/- 0.010 in, Package Quantity 100. This item has been restricted from sale in the following state (s): []