Flat Washer Flat Washer Type Oversized Dimensional Standards AMPG 2003 FIT-TIGHT.01 Material Steel Material Grade/Class Grade 2 Finish Black Oxide For Screw Size 3/4 in Inside Diameter 0.813 in Outside Diameter 2 in Maximum Thickness 0.26 in System of Measurement Inch Minimum Thickness 0.24 in Color Black Inside Diameter Tolerance +/-0.010 in Outside Diameter Tolerance +/-0.010 in Pack Size Small Pack Rockwell Hardness C4 Thickness Tolerance +0.005/-0.020 in Package Quantity 2