Item Specifications UPC 842176162843 Package Quantity 25 Counter Sink Angle 82 Degree Inch / Metric Inch Thread Size 5/16" Inside Dia. 0.409" Outside Dia. 0.938" Thickness Min. 0.141" Thickness Max. 0.188" Material Stainless Steel 18-8 Finish Plain Item Type Washers Washer Type Cup Washer Product Code 5150-6920 SKU 3SWFI905