I would try to soak the threads with a good penetrating oil. But if that doesn't work, I bought replacements at Lowe's. Their hardware section carried them. I think they're called expansion bolts, but don't quote me on that.hey nova people . anyone know how to keep rubber inserts from spinning so i can get bolts out of cond ?? or where to get rubber inserts after i destroy them? PLEASE HELP!! I dont want to destroy them.