Engineered for durability and functionality, this washer from MacLean Senior Industries is made from hot-dip galvanized steel, ensuring enhanced corrosion resistance for long-lasting performance in demanding environments. With an outside diameter of 1-3/8 inches and a convenient 9/16-inch hole, it is designed to accommodate a bolt diameter of 1/2 inch, making it a reliable choice for various aerial hardware applications. Additionally, this washer has been RUS approved, underscoring its adherence to rigorous standards, and it stands out as an essential component for maintaining the integrity and efficiency of aerial line hardware systems.