Flat Washer, Flat Washer Type USS, Dimensional Standards ASME B18.21.1, Material Stainless Steel, Material Grade/Class 18-8, Finish SS304, For Screw Size 7/16 in, Inside Diameter 0.5 in, Outside Diameter 1 1/4 in, Maximum Thickness 0.104 in, System of Measurement Inch, Minimum Thickness 0.064 in, Pack Size Small Pack, Rockwell Hardness Not Rated, Package Quantity 25