A Threading Solution For Thin Plates: Understanding How Self-adhesive Nuts Work

In sheet metal fabrication, cabinet manufacturing, precision equipment assembly and other industries, creating threads on thin plates has been a major technical challenge. Standard steel and aluminum alloy sheets is typically less than 2mm thick-too thin to drill and tap directly. Inadequate thickness will lead to too little thread engagements, poor retention, making assembly in the tightening process easy to peel thread, fastener pull-out and sheet deformation. At the same time, welding nuts have the defects of welding deformation, weld points point oxidation, rough appearance and unsuitable for lightweight components with thin walls. In this context, self-fastening nuts, with their high efficiency, strength and lightweight features, have become a mainstream solution for threaded thin plates and have been widely used in a variety of precision sheet metal products.
these fasteners, also known as self-locking nuts or self-fastening studs, are specially designed for thin-walled panels. Their primary function is to quickly create high-strength threaded holes-without welding or tapping-through cold-pressed devicesand to fundamentally address industry pain points where thin plate threaded connections are weak or fragile. Their structure is precisely designed and consists of three main components: a threaded body, shoulders that limit the depth of penetration, and a serrated locking base. Each design element depends on a specific mechanical principle to ensure stability after installation.
The core principle the self-clinching nut's fixation is to achieve mechanical locking through the plastic deformation metal during cold pressing. traditional fasteners rely on simple surface contact, and installing self-fastening nut is a a permanent fastening process. During installation, the special equipment applies vertical pressure to drive the serrated end of the nut into a pre-drilled mounting hole in the plate. hole diameter accuratelymatched: slightly larger than nut body but smaller than maximum outside diameter of serrated teeth. When uniform pressure is applied, the non-slip serrated teeth at the bottom tighten the hole walls, forcing plastic deformation the plate and some metal into the gap between the serrations. Once the pressing process is complete, the plate is securely clamped between the nut's limiting shoulder and its serrated structure, creating a double lock effect. On one hand, the deformed metal is tightly connected to the serrated teeth of the nut, which completely prevents the nut from rotating in a circumferential direction and eliminates the problem of not rotating properly when the nut is screw tightening. On the other hand, the dual-directional limiting structure prevents axial loosening, effectively resists external forces such as vibration and tension, and avoids falling off or loosening when used for a long time. The entire fastening process does not require high temperature welding and maintains the integrity of the plate and its surface coating, making it ideal for a wide range of sheet metals, including galvanized steel, aluminum and stainless steel.
In practical applications, the stability of self-fastening nuts derives from their scientific mechanical structure. When nut is tightened, the axial pressure is evenly distributed in the interlocking area between the nut and the plate, avoiding the concentration of local stress that may lead to indentations or deformation of the plate. Non-slip serrated interlocking design, effective resistance to operating vibration and external tension, with excellent anti-loosening and anti-seismic performance, meet equipment cabinets, home appliances, new energy equipment, precision instruments and other products long-term durability requirements.