SAE Washer, Flat Washer Type SAE, Dimensional Standards ASME B18.22.1, Material Steel, Material Grade/Class Grade 8, Finish Zinc Yellow, For Screw Size 1 1/4 in, Inside Diameter 1.375 in, Outside Diameter 2 1/2 in, Maximum Thickness 0.136 in, System of Measurement Inch, Minimum Thickness 0.177 in, Color Yellow, Material Quality Standards ASTM F436, Pack Size Small Pack, Rockwell Hardness RC38, Package Quantity 10