USS Washer, Flat Washer Type SAE, Dimensional Standards ANSI B18.21.1, Material Stainless Steel, Material Grade/Class 18-8, Finish Plain, For Screw Size #1, Inside Diameter 1.062 in, Outside Diameter 2 1/2 in, Maximum Thickness 3/16 in, System of Measurement Inch, Minimum Thickness 9/64 in, Inside Diameter Tolerance +/-0.010 in, Material Quality Standards ASTM A582, Outside Diameter Tolerance +/-0.010 in, Pack Size Small Pack