Forum Discussion
mrekim
Mar 03, 2015Explorer
ScottG wrote:
My brackets were installed per the instructions and have stayed tight for 10 years. I would try it again making sure I predrilled with an appropriate size bit.
Good luck.
I think the thickness of the frame will have a huge impact on success. For example a C channel frame will probably be thicker and it may be that a tube frame made 10 years ago would be thicker than one made today.
I would say that the bare minimum would be to use rivet nuts. I know Reese has them as an optional means for installation.
With the 11 Gauge tube frames we have these days there's not much thread engagement for those screws. There's also not much margin for error when tightening them.
The instructions say to tighten the 1/2" 13 TPI self tapping screws to 50 foot-lbs. I suspect the reason that Reese offers the rivnuts is that if you actually follow the instructions and torque the screws to 50 ft lbs on a ~1/8" frame you'll strip out the hole. 13 TPI in 1/8" is only 1.625 threads engaged:
1/8" * 13 threads/inch = 1 5/8 threads.
11 Gauge is slightly thinner.....
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