Originally Posted by
the_tool_man
In a former career, I used quite a lot of Rivnuts on steel sheetmetal work. The best we could achieve was about a 90% success rate of having them installed without spinning in the hole. .....
If the application ever comes up again, coat the back of the sheet stock with coarse lapping compound. When the riv-nut begins to compress it presses the grit into the rim and sheet stock, forming a mechanical lock which will keep it from spinning.