Screw Post in Swedish and where can you buy?

[tet]

I'm looking for this kind of screw/bolt contraption. As I understand, they are called Screw Post in English, but I can't find a translation.

What are they called?
Where can I buy them?

 

[Peter2400]

The most similar is connection fittings.
What are you going to use them for?
https://www.byggmax.se/inredning/beslag/skapbeslag/forbindelsebeslag-2604-habo-nickel-p7240428

 

[tet]

Thanks for the response Peter, it looks like approximately what I'm looking for, but preferably they should have a cleaner appearance.

I bought a key holder in the USA, but it seemed to be adapted for American key rings (their rings are larger). So I need to replace just the part where you hang the keys.

Edit: It seems that they can also be called "Chicago screw."

The diameter of the screw itself should be a maximum of 4mm.

See to the right in the picture below.

 

[tet]

By searching for bokskruv and chicagoskruv , I was able to find what I was looking for, but unfortunately not with the right diameters. I'll have to check eBay or similar instead.