How to install nutsert without tool

Nutserts are great to use because they have a thread inside to bolt things to without needing to get underneath the object and try to hold a nut on, etc. Thread: How to install a nutsert without using the tooling. Thread Tools. I would like to install some riv-nuts in a blind application (boxed frame). I have found all kinds 6 of them to install. Is there a way to crimp them without the tool ? My local ace hardware has a rivnut tool for loan. Worth a shot.