Talking about: the classification and characteristics of the concept of fasteners

Fasteners are the general term for a type of mechanical parts used when two or more parts (or components) are fastened and connected into a whole. It is the most widely used and used in various sectors of the national economy. Mechanical basic parts, known as the rice of industry, are used in various machinery and equipment, vehicles and ships, aircraft and satellites, railway bridges, building structures, tools, instruments, and daily necessities. Considerable fasteners, for example, there are thousands of fasteners on a car.

Fasteners are characterized by a wide variety of specifications, different performance and uses, and a high degree of standardization, serialization, and generalization. Therefore, some people call the type of fasteners that have national standards as standard fasteners. , Or simply referred to as standard parts.

Fasteners are usually divided into 12 categories such as bolts, studs, screws, nuts, self-tapping screws, wood screws, washers, retaining rings, pins, rivets, assemblies and connecting pairs, welding nails, etc., and some The categories can also be classified according to their use, materials, strength grades, shapes, surface treatment methods, etc.

At present, global fasteners are mainly used in the automotive industry, electronics industry, and construction and maintenance industries. Among them, the automotive industry is the largest user, and the demand accounts for about 23.2% of the total sales of fasteners; followed by the maintenance industry market and the construction industry, accounting for about 20% of the total sales of fasteners; the third is the electronics industry, accounting for about 23.2% of the total sales of fasteners. 16.6% of total fastener sales. (Guide: Analysis of corrosion resistance of phosphating fasteners)

From the perspective of industry ownership, the fastener industry was a separate industry sub-category before 2002, but in 2003, according to the new 'National Economic Industry ClassificationSince the number of spring manufacturing companies and economic aggregates are relatively small, it is more technically difficult to exclude them from the fastener industry. Therefore, in the actual analysis of the development of the fastener industry, some data will not be Spring manufacturing companies are excluded. The industry corresponding to fasteners and spring manufacturing is general-purpose parts manufacturing and mechanical repair, and the corresponding industry category is general-purpose equipment manufacturing.

With the continuous advancement of the process of revitalizing the equipment manufacturing industry in my country, the speed of industrial upgrading has been accelerating, and the integration of my country's fastener industry with the economies of all countries in the world has been accelerating, which has raised the product quality and technical level of my country's fastener industry With increasing requirements, whether the fastener industry can continuously improve its overall level is not only related to whether the overall gap between my country's automobiles, major technical equipment and foreign advanced levels can be shortened, but also related to the entire national economy including people’s lives. The level of development.

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