A weld nut is a special type of nut specifically designed to be welded to another object. There are various types for different applications.
- Round base nuts
These nuts have a long threaded cylinder with a large circular base to make welding easy. They also sometimes have projections (known as weld nibs or bosses) to keep the nut from warping while welding with a high current.
- Slab base nuts
- Tab base nuts
- Hex & square nuts
These nuts are very similar to standard square or hex nuts, but have a locating boss and welding projections. The bosses also keep weld spatter out of the threads.
- Retainer weld nuts
Retainer weld nuts, also known as bridge weld nuts, have a floating nut retained inside a retainer to compensate for inconsistencies. The retainer is welded to the workpiece while the nut is allowed to float.
- Tube end nuts
Tube end nuts are sized to fit into the end of standard sized tubing, thus creating a threaded tube from standard stock.
- McMaster-Carr catalog (114th ed.), McMaster-Carr.