What is the definition of a threaded fastener? And what word is most commonly used to describe a threaded fastener?

There are two competing words: “screw” and “bolt”. In Swedish, bolt and screw are easy to distinguish. The screw has a thread. The bolt has no thread. In English, there is no such clear distinction. Some say the screw is fully threaded and the bolt is partially threaded. Some say the bolt must be combined with a separate nut, whereas the screw can be entered in a threaded or unthreaded hole. Most threaded fasteners in the automotive industry are bolts, and this is the word we will mostly use through out the training.