Mil Spec Washer Flat Washer Type Mil-Spec Dimensional Standards MS15795 Material Stainless Steel Material Grade/Class 18-8 Finish NL-19 For Screw Size #8 Inside Diameter 0.188 in Outside Diameter 3/8 in Maximum Thickness 0.11 in System of Measurement Inch Minimum Thickness 0.09 in Color Silver Pack Size Small Pack Resistance Properties Corrosion Resistant Rockwell Hardness B70 Thickness Tolerance +0.036 to 0.065 in Package Quantity 100