I had fun with that Rivnut to install the OEM driver's side traction bar bracket on a factory auto (one bar) car. The hole in the frame rail was already there from the factory (helpful) and Arizona has a great hardware company (Copper State Nut & Bolt) where one can get just about anything.
Then it got tough. There are also two materials for Rivnuts. Steel (better) and cheap aluminum. The steel ones require a very expensive manual tool or a professional pneumatic tool. Since this was a 1 time installation (but I had to buy a min of 10 Rivnuts anyway), I tried out the cheap manual installation tool that works with the aluminum Rivnuts. Even Superman would not have been able to collapse that 3/8's steel Rivnut with that tool, so I returned it (luckily) for a full refund.
I was saved by a YouTube video that showed a way to use a nut, a bolt, and a homemade tool to collapse the Rivet properly without it just spinning. Voila.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI