It is a metallic piece, whose function is to join two or more elements, this type of bolt has a hexagonal head, it is a Coarse Thread, made of low carbon steel and used in jobs that do not require much resistance, it is identified by not wear any mark on the head. It is manufactured with a test load of 60,000 PSI. It is a screw with a metallic zinc finish. It has a semi-gloss appearance and is often used to protect steel from corrosion.