Riveting pcb holes - engineering type input sought!

[magicniner]

I have the mandrel for the setting tool.

Whilst you can buy and use a Riv-Nut setting tool all you need is a flat steel bar with a hole through it and roughed up a bit on the side presented to the Riv-Nut head, preventing slipping when setting.
Use a bolt or bit of threaded bar through the flat bar and fully engaged with the Riv-Nut threads.
With lubed washers & well lubed nut on top, tighten nut whilst ensuring the bolt doesn't turn and set the Riv-Nut to the tension or height of your choice.
I use 60% Moly paste for the lube as it gives the best possible friction reduction and thus translates as much torque as possible into tension.

- Nick