SAE Washer, Flat Washer Type SAE, Dimensional Standards ASME B18.22.1, Material Steel, Material Grade/Class Through Hardened, Finish Armor Coat, For Screw Size 5/8 in, Inside Diameter 0.172 in, Outside Diameter 1 5/16 in, Maximum Thickness 0.125 in, System of Measurement Inch, Minimum Thickness 0.125 in, Pack Size Small Pack, Resistance Properties , Rust , Rockwell Hardness C38, Tensile Strength 150,000 psi, Thickness Tolerance +/-0.010 in, Package Quantity 25