Weld nuts are DIN nuts for welding onto the component or a sheet metal. A distinction is made between the hexagon nut version in DIN 929 and the square nut version in DIN 928.
Welding on or onto the component increases the load-bearing capacity and stability of the component, but the connection is no longer detachable. This application can be found, for example, in body or housing construction in places that are difficult to reach. The nut no longer has to be held when the thread is screwed in, which can be decisive for the decision to use a weld nut.
Important for the selection of the nut is the suitable material, which must be suitable for the welding process. The corrosion resistance of the component must be taken into account. Varnished sheets, for example, are not suitable and must always be after-treated.