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 0.141 in System of Measurement Inch Minimum Thickness 0.158 in Color Yellow Material Quality Standards ASTM F436 Pack Size Small Pack Rockwell Hardness RC38 RoHS Compliant No Package Quantity 350