SAE Washer, Flat Washer Type SAE, Dimensional Standards ASME B18.22.1, Material Steel, Material Grade/Class Case Hardened, Finish Zinc-Plated, For Screw Size 5/8 in, Inside Diameter 0.656 in, Outside Diameter 1 5/16 in, Maximum Thickness 3/32 in, System of Measurement Inch, Minimum Thickness 3/32 in, Pack Size Bulk Pack, Rockwell Hardness B49, Thickness Tolerance +/-0.025 in, Package Quantity 1800