[jhilldrums]

unscrew it and put penetrating oil in the lug. Use a q tip clean up the excess after it sits for an hour, and see if it works. If not, replace the lug. If the bolt is spinning the around inside the lug, (not tightening or loosening, just spinning), you'll need to remove the lug and carefully remove the bolt. If you get it out and everything is not broken up, re thread the threads and you should be all set. Good luck, let us know.