Flat Washer, Flat Washer Type SAE, Dimensional Standards ASME B18.21.1, Material Stainless Steel, Material Grade/Class 316, Finish Plain, For Screw Size 5/16 in, Inside Diameter 0.344 in, Outside Diameter 11/16 in, Maximum Thickness 0.08 in, System of Measurement Inch, Minimum Thickness 0.051 in, Color Silver, Inside Diameter Tolerance +/-0.010 in, Material Quality Standards ASTM A276, Outside Diameter Tolerance +/-0.010 in, Pack Size Small Pack