Flat Washer, Flat Washer Type Standard, Dimensional Standards ASME B18.22.1, Material Stainless Steel, Material Grade/Class 316, Finish NL-19, For Screw Size 1/4 in, Inside Diameter 0.313 in, Outside Diameter 3/4 in, Maximum Thickness 5/32 in, System of Measurement Inch, Minimum Thickness 7/64 in, Color Silver, Manufacturer Location Globally Sourced, Material Quality Standards Not Applicable, Pack Size Small Pack, Resistance Properties Corrosion-Resistant, Rockwell Hardness B70