Many people here don't even know what a bolt is and how it is used. This is one of the most common fasteners. It is a metal rod in the shape of a cylinder, on the outside of which there is a thread. It is crowned with a hat (head), usually hexagonal. With its help, materials are fixed and connected. The connection is made by fixing with a nut or by **** the rod into a hole with an internal helical groove. I advise you to learn how to install them yourself, because they can solve many problems with breakdowns. For more information visit https://www.scrooz.com.au/nuts-and-bolts/.