Square nut, made of high quality metal material by precise process, galvanized surface treatment, with excellent rust and corrosion resistance, can maintain stable performance in a variety of complex working conditions. Its square structure design has unique advantages. Compared with the round nut, it has better anti-rotation effect during installation, and can play a role in some scenes requiring high fastening stability. For example, it is used for fastening the table and chair structure in furniture manufacturing, so that the nut can be effectively prevented from loosening; in the cabinet assembly of electrical equipment, the stable structure can also ensure that the equipment components are firmly connected. From the specification, there are a variety of sizes to choose, can adapt to different specifications of bolts to meet the fastening requirements of many fields, from small precision instruments to large machinery equipment, it is an indispensable fastener for industrial manufacturing, furniture assembly, electrical installation and other industries.