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 #6, Inside Diameter 0.156 in, Outside Diameter 3/8 in, Maximum Thickness 3/64 in, System of Measurement Inch, Minimum Thickness 3/64 in, Pack Size Small Pack, Rockwell Hardness RB40, Thickness Tolerance +/-0.015 in, Package Quantity 790