Flat Washer, Flat Washer Type SAE, Dimensional Standards ASME B18.21.1, Material Stainless Steel, Material Grade/Class 316, Finish Plain, For Screw Size 1/2 in, Inside Diameter 0.531 in, Outside Diameter 1 1/16 in, Maximum Thickness 0.067 in, System of Measurement Inch, Minimum Thickness 0.057 in, Color Silver, Inside Diameter Tolerance +/-0.010 in, Material Quality Standards ASTM A276, Outside Diameter Tolerance +/-0.010 in, Pack Size Small Pack