What is rust and metal corrosion?
Fastening elements are often used in chemical aggressive environment, where steel, without a suitable protection, it reacts with salts and acids, oxidizes and forms what is commonly known rust. (more…)
This kind of coating is applied both for protective and aesthetic purposes. Chrome plating provides similar corrosion resistance to zinc plating but gives an aesthetically pleasing appearance to fasteners as well.
The thickness of coatings ranges from 0.05 to 0.5 μm and is usually between 0.13 and 0.25 μm. (more…)
Socket screws (also referred to as Allen screws by the name of their inventor) appeared more than 100 years and since then they have been developed with different head types and shapes, always maintaining a relevant role in the fastening market due to their handiness and reliability.
Indeed, socket screws are provided with a hexagon recessed head which enables easy assemblies where there is not sufficient clearance for fastening tools.
Nuts, manufactured from various metals and plastic, are a type of fastener with a threaded hole. They are almost exclusively used to mate with a bolt that has the correct threading pattern.
The friction of the bolt and nut threads against one another creates a temporary joint that holds material together.
In Vipa nuts are available in different sizes and shapes for a wide range of purposes.
Nickel electroplating is a coating process that consists in covering the surface of the metal with a thin layer of nickel (3 µm) by means of electrolysis. In practice the metal is submerged into an electrolyte solution that allows the transfer of nickel ions onto the material that has to be treated. (more…)
Machine screws are a smaller type of screw, threaded along the entire length of their shank. They are designed to engage with already threaded nuts or threaded holes and are largely employed to fasten metal parts together in all types of machines and industrial manufacturing equipment.
GEOMET® 500 is a high-performance anti-corrosion system, applied for the treatment of steel, cast and other ferrous metal parts that provide optimal results in terms of friction as well. It is largely used by some of the main automotive manufactures around the world because it respects their strict standard of quality. (more…)
Burnishing or black oxidation or black oxide or chemical black
This protective coating consists in two different procedures.
Vipa’s customers have at their disposition a vast range of fasteners manufactured according the main International standards as ISO, EN, DIN, UNI and ANSI.
But what is a standard and why is essential to know the meaning of that acronyms for a more mindful purchase of fasteners.