Bolts / Nuts For The Hexagonal Holes In The Chassis

[seewhy]

There are loads of these hexagonal holes and I assume you can put a 'blind' nut in and bolt something to it. I'm wanting to put a bracket under the van and this looks like an obvious attachment point. I'm thinking they'd be an M8 bolt?

I know this is a really basic question, so please stop laughing.

Does anyone know how to find a source of nuts or bolts that fit these holes in the chassis? I've seen them called hexnuts / hexserts and hexagonal rivnuts, but none of the ones I can find look like they would work as a blind fitting. And I don't know which one is the right term to describe them to get the right part.

Thanks

 

[Lukavell]

They are called rivnuts. I'd never heard of them until fitting my erberspacher a few weeks back.

 

[oldiebut goodie]

I hadn't seen the hexagonal ones until this post and looked at them Steel, Hexagon Body Rivet Nuts/Rivnuts/Nutserts

 

[seewhy]

Thamks Oldiebut and Lukavell. Especially for the link - that's the type I'd seen but wasn't sure how they worked - now it makes sense...

Much appreciated