Finish

Mechanical Galvanized

This finish, also known as peen plating or impact plating, provides uniform thickness and good corrosion resistance. It is a great on parts subjected to vibration where a normal finish could be compromised and reduce its effectiveness. It also prevents hydrogen embrittlement.

Plain

Nothing has been done to this bare metal surface to improve appearance or corrosion resistance, which is very low if the material is steel. Often the surface has been oiled which improves lubricity. This finish is susceptible to rusting and corrosion in exterior environments. This most basic finish can be used when protection is not an issue or indoors.

Material

Steel

Steel is the most common fastener material due to its strength properties. Unalloyed steel may be surface treated to enhance corrosion resistance and other desirable properties.