This is your new coach, right? Although it might sound like RM copped out on you, it seems odd to me, too, that those threads would strip. On OUR coach, sure. We have loads of corrosion (politically correct name for RUST) under there. That was the worst part for me, upgrading the rear sway bar. One of the captive nuts on the axle bracket wouldn't come loose and once I got a long enough wrench on it, the spot welds broke, leaving the nut spinning but still stuck. I got past that eventually and got'er done.
Thinking of welding a coat hanger or similar rod to a nut... That's the school solution, and of course companies like RM furnish such where needed for a new installation.
WAIT!! Epiphany! Is there a Trailer Hitch Shop (like a major U-Haul garage) nearby? Might have some extra "wired nuts" around. You don't care if it's Metric or English, so long as you get a matched Nut/Bolt set. Be sure the threads are free and clean so there's no torque on the nut till it bottoms and starts to tighten.
Otherwise, if you ran coat hanger wire around a nut, pinched it tight, then added some Epoxy, you'd have a Poor Man's Wired Nut.
These Whiz Nuts are wonderful for staying where you tighten them. And, the Flange would provide more surface for epoxy to stick to.
