I really doubt its stripped man, they just get stuck thats allYeah its the threads in. The 8mm allen wrench fits but doesnt turn anything. I am gonna try the next size up and see if I can get it to budge loose, then replace the the fill plug. I hope the drain plug is not that way!? If worst comes to worst I will get a nut welded onto the plug. Any other ideas would be greatly appreciated.