Flat Washer, Flat Washer Type Standard, Dimensional Standards ANSI B18.22.1, 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 3/64 in, System of Measurement Inch, Minimum Thickness 3/64 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