Brass nut in case loose

The SkyWeather2 case has 4 brass nuts that hold the top and bottom of the case together when bolted down. One of the brass nuts has gotten loose in the hole and isn't secure. Any recommendation to hold it in place under stress when the bolt is torqued down gently? I'd prefer to not have the case open during temperature changes with the seasons after I get it mounted. Will superglue work on the nut and the case or is there a better solution?
Thanks!
Dow