Black Locking Lug Nuts Custom Lug Nuts Alloy Wheel Locking Nuts

Black locking lug nuts made of SCM435 with heat treating to reach grade 10.9/12.9 and then black galvanizing. The size can be M14/M18/M19/M20/M22/M24/M27/M28/M30/5/8″/3/4″/7/8″/1″/1 1/8″. Ever Hardware provides custom-made fasteners and customizable packaging.

Galvanization, or galvanisation, (or galvanizing as it is most commonly called in that industry), is the process of applying a protective zinc coating to steel or iron, to prevent black locking lug nuts rusting. The most common method is hot-dip galvanizing, in which parts are submerged in a bath of molten zinc. Galvanizing protects in three ways:
It forms a coating of zinc which, when intact, prevents corrosive substances from reaching the underlying steel or iron.
The zinc serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will still be protected by the remaining zinc.
The zinc protects its base metal by corroding before iron. For better results, the application of chromates over zinc is also seen as an industrial trend.

Heat treating makes the black locking lug nuts high tensile to be Grade 10.9/12.9. Heat treating is a group of industrial and metalworking processes used to alter the physical, and sometimes chemical, properties of a material. The most common application is metallurgical. Heat treatments are also used in the manufacture of many other materials, such as glass.