Set screws are similar to hexagon bolts, with the exception of being fully threaded instead of an un-threaded shank. They have a six sided head to allow for tightening via a socket wrench or spanner.
Set screws are used in a wide variety of applications, although primarily in the construction industry, steel fabrications, machine building and automotive parts. They are also available in a variety of finishes depending upon the installation environment.
Galvanised coatings prevent oxidation of the protected metal to create a longer lasting finish. It does this by forming a barrier and by acting as a sacrificial anode if this barrier is damaged. Galvanising is a plating that (in contrast to iron oxide) does not trigger a breakdown of the substrates surface integrity as it is formed. The galvanising, if left intact, can act as a barrier to further oxidation, in a way similar to the protection afforded to aluminum and stainless steels by their oxide layers.