This bulk keg of 380 3/4-10 x 3 1/4 A325 Type 1 Heavy Hex Bolts are made of high-strength steel, perfect for commercial and industrial applications. They are hot-dip galvanized for added durability and corrosion resistance. These heavy-duty bolts boast a high tensile strength of at least 120,000 psi, making them perfect for a wide range of tough jobs.