Copper Plating is a surface treatment that involves applying a thin layer of copper to the surface of the screw.
It plays a crucial role in protecting the material, especially as an intermediate layer for following nickel and chrome plating.
Copper plating is therefore often used as a preparatory step to improve the adhesion of other coatings.
Among its other advantages, it reduces friction during screwing and lowers the risk of seizing.
Additionally, the treatment gives the screws a distinctive appearance, imparting a unique reddish-copper color that allows for immediate identification.