Fasteners, I believe everyone is familiar with this term, especially the students in the mechanical or automotive industry, it is commonplace, but many people have only heard of this term and do not understand some basic knowledge of fasteners, then this article will Will study with everyone.
The fasteners we often refer to generally refer to national standard types, including bolts, nuts, studs, screws, self-tapping screws and rivets, flat washers, spring washers, etc.
The commonly used connection types of fasteners are: bolt-nut connection, double-end stud, welding nut. Riveting nuts, self-tapping screws, riveting, etc.
The commonly used anti-loosening methods for fasteners are: bolt-nut, bolt-nut-washer combination type. When flat washer and spring washer are used, remember the order of first flat washer and then spring washer.
The bolt pre-tightening force can improve the reliability of the connection, the ability to prevent loosening, and at the same time can increase the tightness and rigidity of the connection, and improve the safety.
In the case of threaded connection, the threads are divided into pipe threads, drive threads, special threads, internal threads and external threads. According to the shape of the threads, they can be divided into triangular threads, rectangular threads, and trapezoidal threads.