Durable 1000 Count Flat Washers – Black Zinc Coated for Corrosion Resistance por | ago 5, 20261000 pieces black zinc plated steel flat washers in various sizes: M2, M2.5, M3, M4, M5, M6, M8, M10, M12. Engineered to distribute the load of fasteners, minimizing wear and prolonging the life of your projects.