USS Washer, Flat Washer Type USS, Dimensional Standards ASME B18.22.1 Type A Wide, USS Standard, Material Steel, Material Grade/Class Grade 2, Finish Plain, For Screw Size 3/16 in, Inside Diameter 0.25 in, Outside Diameter 9/16 in, Maximum Thickness 3/64 in, System of Measurement Inch, Minimum Thickness 3/64 in, Pack Size Small Pack, Resistance Properties Corrosion-Resistant, Rockwell Hardness 38HRC, Thickness Tolerance +/-0.014 in, Package Quantity 100