Engineered for secure fastening in aerial applications, these lag screws are specifically designed to attach pole line hardware to telephone poles and other wooden structures. Crafted from Grade 2 Steel, they boast a hex head measuring 1/2 inch across flats, ensuring a reliable grip during installation. The hot dip galvanized finish meets ASTM Specification A153, providing enhanced corrosion resistance for long-lasting performance. With a Rockwell Hardness ranging from B70 to B100, these 5/16 x 2 inch lag screws deliver the durability and strength needed for dependable outdoor applications.