What type of fastener is commonly used to hold two or more parts together with a threaded hole?

A bolt is a type of fastener specifically designed to hold two or more parts together by being inserted into a threaded hole. The bolt features a head on one end and a threaded shaft, allowing it to be securely anchored in place when paired with a nut. The threads on the bolt create a strong mechanical connection when tightened, making it especially suitable for applications where a secure fastening is essential.

Nuts, while also common fasteners, are used in conjunction with bolts; they do not serve the primary role of holding parts together independently. Washers provide support and distribute load but do not create a fastening by themselves. Jam nuts are used primarily to lock another nut in place and are not used as standalone fasteners to hold parts together. Thus, the bolt is the most appropriate choice for the scenario described.