Has anyone ever seen any nails with shiny yellow heads that were approved for exterior deck use? The wood is Cox Durapine with CA (Copper Azole) wood preservative.
They were recessed pretty good so I did not bother with a picture.
Added with edit: I think these are hot-galvanized which are not rated for this wood like hot-dipped galvanized would be.
Here is a very good link on this subject for future reference
It says that bolts 1/2 inch and larger do not need to be hot-dipped or stainless when used with the new treated lumber.