The hex nut requires a special wrench to hold and remove it. The main purpose of the hex nut is to provide fixation, and the hex nut is mainly used for mechanical fixation. This advantage is to be easy to fix, will not play the consequences of sliding wire, and is easy to disassemble, this with the inner hexagonal wrench is mutual cooperation.In addition to the wide application of hex nut in the mechanical manufacturing industry, small hardware components and electrical products all have its shadow, and many furniture are also fixed with hex nut now.