Shop for 2S0736 C-Brand WASHER HARD At Wholesale Prices, obtain heavy-duty parts from the biggest dealer and supplier.Specifications:"Material: HARDENED STEEL Washer Type: FLAT WASHER Fits Bolt Sizes (in): 5/8 Material Description: Hardened Steel Coating: Zinc Phosphate + Oil offers corrosion protection up to the point of assembly (recommend painting for external applications). Salt spray resistance of 72 hours to red rust. Coating color - dark grey to black. Inner Diameter (in): 0.669 Outer Diameter (in): 1.063 Thickness (in): 0.138"