Beveled Washer Flat Washer Type Beveled Material Steel Material Grade/Class Grade 5 Finish Black Oxide For Screw Size 1/4 in Inside Diameter 0.281 in Outside Diameter 5/8 in Maximum Thickness 0.125 in System of Measurement Inch Minimum Thickness 0.125 in Inside Diameter Tolerance +/-0.010 in Outside Diameter Tolerance +/-0.010 in Pack Size Small Pack Rockwell Hardness C4 Thickness Tolerance +0.005/-0.004 in Package Quantity 25