MonkeyBoy

I lost one of the bolts that holds on the retractable spoiler - the bolt that comes in from the side. I replaced it with an extra license plate bolt as it was the same threadcount and size and it worked well for a few days until it fell out. I repeated the process and torqued the bolt much tighter this time... but it still fell out. The up and down movement seems to unscrew it. Is there a washer that's supposed to go in there? Do I need lock-tite?