Fasteners are also called standard parts in the market. They are a general term for a class of mechanical parts used when two or more parts (or components) are fastened and connected into a whole. It is characterized by a wide variety of specifications, different performance and uses, and a high degree of standardization, serialization, and generalization. Fasteners are the most widely used mechanical basic parts and are in great demand.

Fasteners are the most widely used mechanical basic parts. With China's accession to the WTO in 2001, it has entered the ranks of major international trading nations. China's fastener products are exported to various countries in the world, and fastener products from all over the world are also pouring into the Chinese market. Fasteners, as one of the products with a large import and export volume in China, are of great practical and strategic significance for promoting Chinese fastener companies to go global and promoting fastener companies to fully participate in international cooperation and competition. Since the specifications, dimensions, tolerances, weight, performance, surface conditions, marking methods, acceptance inspection, marking and packaging of each specific fastener product are specified in several national industry standards, such as the British standard , German standard and American standard.