I use a lot of Concept enclosures as well partially due to their multiple rating - 4/12/13. Just thought it was worth pointing out, as I've experienced working with others who are absolutely convinced that Nema 12 is appropriate for outdoor use.
I seem to remember something in the Hoffman literature stating that if you provide a proper method of drainage, a N12 could be used as a N3R. I think they even sold a drain fitting for that purpose. That was back in the early '80s and things could be different now (too lazy to check). My memory ain't what it used to be either!
Buy you are correct - a N12 as-produced cannot be used outdoors, and there are a lot of people who think otherwise.