Originally Posted by
79pmooney
You know. with care, I bet virtually all loose rivnuts could be epoxied and used a long time. Getting the area clean would be a challenge. I'd start a screw after epoxying and also set a thin layer of the mixed epoxy aside so I could seen when it is almost set up hard, then back the screw out at that time. (Prepping the screw threads with wax or soap would be smart.) I would go with JB Weld or Marine Tex. Maybe pretty up the job with a little liquid boat building epoxy and an artist's brush after. (Used to build boats. For some kids it's the sand box. For me it's the gooey stuff.)
Better yet, just cut it out, epoxy the area as you describe, and install a fresh, brand-new rivnut.
I dare say the diameter probably matters less than the completeness of the crush between the tubes. That's probably why some of them fail too; the rivet may only crush against the lower crown/curvature of the tube.
-Kurt