Whats this bolt and nut called?

I want put new one in and im getting 2 different answers so need the correct one. I need the bushings too. Whats the correct parts store description? Its the missing bolt

 

Sway Bar End links. While your at it replace the sway bar bushings as well.

 

Sway Bar End Link

 

Some places call it a "Stabilizer link kit".

 

What year car? I think they can be different as it gets tight in there.

 

OEM, and common parts-store end link kits will have rubber bushings.

Better to buy a kit with Polyurethane bushings. They're firmer, the sway bar is more effective, but the big improvement is that the Poly end-link bushings last longer than rubber.

All the same can be said for the main sway bar bushings; common ones are rubber, Poly is available in the aftermarket. The best Poly sway bar bushings have grease zerks on the metal brackets.

 

Skip the poly bushings. Rubber ones will last a good long time on a likely "hobby car". Poly stuff squeaks, one you'll never notice a handing difference on an old barge..