Flat Washer, Type B, Flat Washer Type Standard, Dimensional Standards ASME B18.22.1, Material Stainless Steel, Material Grade/Class 18-8, Finish Plain, For Screw Size 1/4 in, Inside Diameter 0.281 in, Outside Diameter 1 in, Maximum Thickness 0.071 in, System of Measurement Inch, Minimum Thickness 0.056 in, Color Silver, Inside Diameter Tolerance +/-0.010 in, Material Quality Standards ASTM A582, Outside Diameter Tolerance +/-0.010 in, Pack Size Small Pack