Review on Powerful Astro Pneumatic Tool RN8M: 100-Piece M8 8mm Steel Rivet Nuts for Ultimate Fastening Efficiency by Brandon Hilton

6 of them tested on a piece of sheet steel and all 6 are installed correctly and pass the 25Nm torque test for M8-1.25 threads. Tip: Even if they are steel, you can successfully install one or more with an M8 bolt, washer, nut and 2 box wrenches. You don't need superhuman strength either. A good alternative if you don't have room for huge installation tools or just want to install a few. Just practice a few times on a drilled piece of sheet metal.