NCheek
Howdy
What happened? were you able to get a bolt threaded into the washer? 5/16" NC bolt is ideal. Give the penetrating oil more time to work and try again. Don't give up yet.
Patience is key, when you get stressed, the truck gremlins win, and we don't want that, so keep it soaking and just keep working it, IT WILL COME OUT EVENTUALLY!