Type B Washer, Flat Washer Type Standard, Dimensional Standards ANSI B18.21.1, Material Stainless Steel, Material Grade/Class 18-8, Finish Plain, For Screw Size #4, Inside Diameter 0.125 in, Outside Diameter 3/8 in, Maximum Thickness 3/64 in, System of Measurement Inch, Minimum Thickness 1/32 in, Color Silver, Inside Diameter Tolerance +/-0.010 in, Material Quality Standards ASTM A582, Outside Diameter Tolerance +/-0.010 in, Pack Size Small Pack