APPLY TO - Hex head bolts can be widely used in home and office appliances, communication equipment, ship assembly, and other machinery industry.SPECIFICATION:Product Name: Hex Head BoltsMaterial: Carbon Steel Zinc PlatedThread Size: 9/16-12x4"Hex Head Size: 0.813"(D)x0.359"(T)QUANTITY INCLUDED - 5pcs x Hex BoltsDESIGN - Hexagon bolts are fully threaded. Threads are well-machined and accurately cut. Sharp, smooth, speeding up the fastening process in many applications, meeting all demands.ADVANTAGE - Our bolts are made of zinc-plated carbon steel, with good anti-rust and corrosion resistance properties, feature good wear resistance, high hardness, and high strength, and can be used in extreme environments.