The development history of hexagonal bolts witnesses the progress of human industrial civilization. Looking back to ancient times, although there was no hexagonal bolt in the modern sense, there was already a simple bolt prototype for object connection. The Industrial Revolution brought a leap to it. The improvement of mechanical manufacturing technology made standardized production possible. Due to the unique hexagonal head design of hexagonal bolts and being suitable for wrench operation, it can be tightened and disassembled efficiently. It stands out among many connection methods and quickly becomes popular in the industrial field. In terms of materials, from the initial single ordinary carbon steel, it has developed to now cover multiple choices such as stainless steel, alloy steel, copper and titanium alloy, meeting the needs of different scenarios for strength, corrosion resistance, electrical conductivity and other characteristics. At the process level, the early rough production has been replaced by advanced processes such as cold heading and hot heading. The precision and production efficiency have been greatly improved. Combined with rich surface treatment technologies such as galvanizing and nickel plating, the durability and aesthetics of bolts are further enhanced. Along with the development of various industries, its application fields have extended from mechanical manufacturing to automobiles, aerospace, construction, etc. In modern social infrastructure and high-end technological equipment, hexagonal bolts all play a key connection role.
