Fender Washer Flat Washer Type Oversized Dimensional Standards ASME B18.21.1 Material Steel Material Grade/Class Grade 2 Finish Black Oxide For Screw Size 5/16 in Inside Diameter 0.344 in Outside Diameter 2 in Maximum Thickness 0.065 in System of Measurement Inch Minimum Thickness 0.065 in Color Silver Maximum Temperature 302 Degrees F Minimum Temperature -58 Degrees F Pack Size Small Pack Thickness Tolerance +0.08 in /-0.047 in Package Quantity 100