Standardization and serialization: Fasteners are characterized by a wide variety of specifications and performances, but they are highly standardized, serialized, and universal. Many fasteners have developed national standards and are called standard fasteners.
Widely used: Fasteners are widely used in various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, meters, and supplies. They achieve tight connection of parts through thread design to ensure the normal operation of machinery and equipment.
Various classifications: Fasteners can be divided into multiple categories, including bolts, nuts, studs, screws, self-tapping screws, wood screws, washers, retaining rings, pins, rivets, fastener assemblies, and connection pairs. Threaded fasteners such as screws, nuts, bolts, and studs are connected through thread design, while non-threaded fasteners such as rivets and washers use different fastening methods.
Material and manufacturing process: The production process of fasteners includes material acceptance, modification, and surface treatment. Material acceptance ensures that the steel meets production requirements. The reforming process optimizes the organizational structure, reduces hardness, and enhances plasticity, while surface treatments such as phosphating form a protective layer to increase friction coefficient and corrosion resistance.
Specific application examples: For example, the fasteners for railway motor bearing bushes use solid bolts and special-shaped spikes and ratchet designs, which can provide a certain strength, prevent loosening caused by vibration, and are easy to install and disassemble, with low cost
