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 1 1/4 in Inside Diameter 1.313 in Outside Diameter 2 1/2 in Maximum Thickness 0.165 in System of Measurement Inch Minimum Thickness 0.165 in Pack Size Small Pack RoHS Compliant No Thickness Tolerance +0.027/-0.029 in Package Quantity 50