G.I Hex Nuts

A nut is a small metal object with a hole in the middle that has corrugated hole.
These curved holes are known as threads.
Nuts are used as a fastening device.
It is important to note that evens though nuts are used as a fastening device, they cannot be used without bolts.
To understand this, we have to understand the shape of walnuts.
The outer part of its body can be shaped either way, but it is mostly hexagonal cap or circular in shape.