USS Washer, Flat Washer Type USS, Dimensional Standards ASME B18.22.1, Material Steel, Material Grade/Class Grade 2, Finish Zinc Yellow, For Screw Size 3/8 in, Inside Diameter 0.438 in, Outside Diameter 1 in, Maximum Thickness 0.084 in, System of Measurement Inch, Minimum Thickness 0.084 in, Color Yellow, Pack Size Bulk Pack, Rockwell Hardness RC38, Thickness Tolerance +/-0.020 in, Package Quantity 3700