Flat Washer, Flat Washer Type Standard, Dimensional Standards ASME B18.21.1-2009 (R2016), Material Steel, Material Grade/Class Case Hardened, Finish Zinc-Plated, For Screw Size #10, Inside Diameter 0.219 in, Outside Diameter 1/2 in, Maximum Thickness 1/16 in, System of Measurement Inch, Minimum Thickness 1/16 in, Color Silver, Pack Size Small Pack, Resistance Properties Corrosion-Resistant, Rust-Resistant, RoHS Compliant RoHS Compliant, Package Quantity 435