Flat Washer Flat Washer Type SAE Dimensional Standards ASME B18.21.1 Material Titanium Material Grade/Class Grade 2 Finish Plain For Screw Size 3/8 in Inside Diameter 0.406 in Outside Diameter 13/16 in Maximum Thickness 0.08 in System of Measurement Inch Minimum Thickness 0.051 in Color Silver Inside Diameter Tolerance +/-0.010 in Material Quality Standards ASTM B348 GR 2 Outside Diameter Tolerance +/-0.010 in Pack Size Small Pack