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Rivet nuts, also known as pull rivet nuts or pull caps, are used in the fastening field of various metal sheets, pipes, and other manufacturing industries. They are widely used in the assembly of electromechanical and light industrial products such as automobiles, aviation, railways, refrigeration, elevators, switches, instruments, furniture, and decoration. Developed to solve the disadvantages of metal sheet and thin tube welding nuts being prone to melting, base materials being prone to welding deformation, and internal threads being prone to slipping, it does not require internal threads or welding nuts, has high riveting efficiency, and is easy to use.

Ordinary bolts are divided into three types: A, B, and C. The first two types are refined bolts, which are less commonly used. Generally speaking, ordinary bolts refer to C-grade ordinary bolts.

Anti loosening nuts and self tightening nuts are common types of fastening anti loosening nuts. Including mechanical anti loosening, riveting anti loosening, friction anti loosening, structural anti loosening, etc

U-bolt, also known as U-card, U-screw, U-pipe clamp, U-pipe clamp, is a type of bolt commonly used in pipeline installation to fix pipes. It is shaped like a U and is used to link two fasteners. National standard for U-shaped bolts: JB/ZQ4321-1997