[DutchmenSport]

I had 4 different trailers, 3 travel trailers and the fifth wheel. I have never been able to use self-taping screws on the trailer frame. I've always had to pre-drill a hole that was slightly smaller than the screw diameter. Then the self tapping screw would cut it's own thread.

FYI, the screws on the bottom of mine are those little bitty things, and no washers. All of them have broken out leaving the colorplast dangling. I've replaced almost all of the original screws and used the largest washers I could find at the time.

I also added more screws and sealed up the places where the colorplast had gaps.

And the J-trim on the edges are pathetically installed. The metal around those screws broke out too, leaving the J trim dangling as well. I used new screws, and the largest washers I could find, because they cut the edge of the J trim so close, there was only about a 1/4 inch from the edge of the hole to the edge of the metal J trim.

So shoddy!