Screw

The screw is used for connecting or fixing parts. Screws are usually screwed into the threaded holes or simply into the part if it is sufficiently soft. The production of screws is possible from various alloys and steel. If the screws will experience difficult weather conditions, there is a risk of corrosion, stainless steel, titanium, brass, and bronze are used. Sometimes screws are covered with copper, zinc or chrome. In order to avoid the effect of electric current, aluminum screws are used. The same type of screw can be made of different materials.