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Fasteners, fastener for fastening connection and application is a kind of widely used mechanical parts are widely used all kinds of machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, meters and equipment and so on, can be seen in every kind of fasteners. It is characteristic of different specifications, performance of different uses, and standardization, seriation, generalization degree is very high. So there are a type of fastening has been the national standard of a known standard fasteners, or referred to as standard parts. Fasteners are the most widely used basic pieces of machinery. With China's entry into WTO in 2001 and entered the ranks of international trade. China's fastener products exported to the fastener products all over the world, the world is also a continuous influx Chinese market. Fasteners in China as one of the large amount of import and export products, and achieve international standards, to promote the China fastener enterprises to the world, promote the fastener enterprises to participate in international cooperation and competition, it has important practical significance and strategic significance.