FZV: Hot-dip galvanized. This is a surface treatment that also enables the material to withstand aggressive environments, albeit in a different safety class. The surface treatment involves dipping each piece into a galvanizing bath after tasks like punching holes have been completed. The surface layer ranges between about 70-100 my depending on the type of steel used.

FFZV: This is also a hot-dip galvanization with the difference that the galvanization is done before punching. The first F stands for "before". Split standard clamps are often "PreHotGalvanized."

Below you can see a classification of environment and safety classes. Safety class relates to fastening. Ensuring the correct type of anchor or plug is chosen.
http://www.vvs-smide.se/p.html
 
Thank you very much for the explanation!
I think this sounds like a very good deal.
Best regards
Fredrik
 
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