What's the difference between bolt, screw and stud?

Screw "is just the general term of fastener They are everyday expressions They include: bolts, screws, nuts As long as there are threaded fasteners, screws, nuts, bolts and screws have something in common, that is, they have threads What's the difference between threads The following small series describes the differences between bolts, screws, and studs How to distinguish screw fasteners Let's understand it!