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 in, Inside Diameter 1.063 in, Outside Diameter 2 1/2 in, Maximum Thickness 0.165 in, System of Measurement Inch, Minimum Thickness 0.165 in, Color Silver, Material Quality Standards Not Applicable, Pack Size Small Pack, Resistance Properties Corrosion-Resistant, Rockwell Hardness B70, Thickness Tolerance + 0.136 to 0.192 in. This item has been restricted from sale in the following state (s): []