The Allied Bolt Square Washer (vendor part 11500, Millennium part 527423) is a 2-1/4 in x 2-1/4 in AISI 1018 steel washer sized for 5/8 in bolts on aerial line hardware, giving crews a wider bearing surface than the standard 2 in washer for higher-load guy and anchor assemblies. Hot-dip galvanized to ASTM A153 for corrosion resistance through long-term outdoor service on pole lines. The larger footprint helps prevent the washer from crushing into wood pole surfaces under heavy tension. Millennium also stocks the 2 in version for 5/8 in bolts and matching washers for 1/2 in and 3/4 in bolts.