Fender Washer Flat Washer Type Oversized Dimensional Standards ASTM F844 Material Stainless Steel Material Grade/Class 18-8 Finish NL-19 For Screw Size 3/8 in Inside Diameter 0.406 in Outside Diameter 1 1/4 in Maximum Thickness 0.05 in System of Measurement Inch Minimum Thickness 0.05 in Color Silver Pack Size Small Pack Resistance Properties Corrosion Resistant Rockwell Hardness B70 Thickness Tolerance +/-0.010 in Package Quantity 10