You may be able to MacGyver a nut onto a wrench. Tape the nut into an open end wrench, tape the wrench to a yardstick, that kind of thing. But definitely call Roadmaster and see if they can help. Hendersons Line-Up in Grants Pass OR might have a suggestion. John Henderson there, told me he spends an hour or two a day, answering inquiries.
I had self-tapping bolts tear up the threaded inserts in the frame of my truck while installing a Roadmaster base plate. I drilled the botched threads out and used bolts with nuts behind the drilled inserts.
