What is the difference between a bolt and a square nut?

Bolts and nuts are standard parts, also known as fasteners. Classified according to the national standard GB 5780. Usually the protruding outer lines are bolts (commonly known as screws), and those with inner lines on the bolts are nuts. So do you know what is the difference between bolts and square nuts?
Square nut: The parts that tightly connect mechanical equipment can only be connected together with the same specifications of nuts and bolts through the inner threads. For example, M4-P0.7 nuts can only be connected with M4-P0.7 series bolts; A nut is a nut, a part that is screwed together with a bolt or a screw for fastening, and a component used in all manufacturing machinery according to the different materials and several types.
Bolt: A mechanical part, a cylindrical threaded fastener with a nut. A type of fastener consisting of a head and a screw (a cylinder with an external thread), which needs to be matched with a nut to fasten and connect two parts with through holes.
The difference between bolts and square nuts is mainly described above. We all need to understand the difference between our bolts and nuts, and we need to choose our suitable bolts and nuts.
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