SAE Washer Flat Washer Type SAE Dimensional Standards ASME B18.22.1 Material Steel Material Grade/Class Grade 2 Finish Black Oxide For Screw Size #4 Inside Diameter 0.125 in Outside Diameter 5/16 in Maximum Thickness 0.02 in System of Measurement Inch Minimum Thickness 0.02 in Pack Size Small Pack RoHS Compliant No Thickness Tolerance +0.005/-0.004 in Package Quantity 100