Engineered for durability and reliability, this lag screw from Allied Bolt is essential for fastening poleline hardware to utility poles and other wooden structures. With a 3/8-inch diameter and a length of 3 inches, it features a 9/16-inch square head that can be utilized with both wrenches and drivers, thanks to its specially designed curved upward "fetter" thread. Each bolt is manufactured from Grade 2 Steel and hot dip galvanized, fully complying with ASTM Specification A153 for enhanced corrosion resistance. Supplied in boxes of 500, the bold bolt head marking (ABI) registered with the U.S. Patent Office ensures both authenticity and quality in your installations.