Thanks, been out there messing with it. Got the bolt out and was able to heat up the threaded nut (threaded on outside of nut)and carefully popped it out.
Put threaded nut in vise and using wd40 carefully tighten bolt in to nut,working it back and forth till moved freely.
Then once plastic cooled
around hole reinserted threaded nut, which believe it or not screwed in secure. Othewise I was going to gorilla glue it in.Then re- installed bracket and bolts. All tightened up nicely and holding firm
Simple 30 minute install fpr tow hook, took 6 hours to figure out and fix one bolt