There are many names for bolts, and everyone's name may be different. Some people call it screws, some people call it bolts, and some people call it fasteners. Although there are so many names, they all mean the same thing. They are all bolts. Bolts are the general term for fasteners. Bolts are tools that use the physics and mathematics of the oblique circular rotation and friction of objects to gradually tighten objects and parts.