Probably ok, provided you use a longer vertical piece of conduit on the wall, so you can put a couple pipe straps on it, taking the strain off the threaded connector.
I'm thinking maybe a 12" or 16" vertical run before the 90 deg bend out away from the wall. Pair of straps. Nice and snug will help keep it positioned and the top one will carry the vertical forces.
Might still vibrate a bit in the wind though, if mounted outside.