Designed for reliable performance in aerial hardware applications, these locknuts create a vibration-resistant fit when paired with standard square nuts. Specifically made for 5/8" diameter bolts that are tapped 5/8-11-UNC, the MF locknut firmly secures connections by requiring an additional 1/2 to 3/4 turn to lock in place. Crafted from steel and hot-dip galvanized per ASTM A-153 standards, they offer durability and corrosion resistance, ensuring long-lasting use in various environments. RUS listed, this product is a dependable choice for professionals in need of robust fastening solutions in aerial line hardware systems.