In the fastener industry, we often encounter questions about nuts, such as the subtle differences between self-clinching nuts, pull-riveting nuts, and expansion nuts. Today, we'll delve deeper into the similarities and differences between these nuts.
First, let's look at pull-riveting nuts. Also known as rivet nuts, pull-nuts, or instant pull-nuts, they are widely used in the assembly of electromechanical and light industrial products, such as automobiles, aviation, instruments, furniture, and decorative items. These nuts were developed to overcome traditional challenges, such as the tendency of welded nuts to melt when welding thin metal sheets and tubes, and the tendency of threads to slip when tapping internal threads. Their greatest advantage is that they eliminate the need for tapping internal threads or welding nuts, achieving a secure riveted joint with ease and high efficiency.
Pull-riveting, a key step in the riveting process, involves plastic deformation of the riveted parts under the action of an external tensile force. This deformation is typically concentrated in specially designed areas, whereby they firmly grip the base material, creating a secure connection. Commonly used pull-riveting nuts are connected to the base material using this riveting method. There are a wide variety of rivet nuts available on the market, with common types including flat head, countersunk head, small countersunk head, flat head hexagon, small head hexagon, and blind hole rivet nuts.