Yet another reason I won't let my dealer touch my trailer

Reese supplies all the hardware. The bolts are self threading. Drill the hole to the appropriate size and then run the self tapping bolt in and torque it. I had mine on 2 trailers with the same hardware. The last trailer it was on for 13 years and never loosened up. I did check them once in a great while, but they were always tight. I do believe they screwed up the install somehow, but it should’ve been caught earlier than this!