Can someone explain this? Am I missing something?

 

Can we see a better pix of the part in your hand ?

 

Thats the bolt that goes through mount. How is that supposed to keep it from moving? It’s just going to bang against all that metal.
i took off the front mount, it’s not quite as roomy, but it’s still wearing on the inside and on threads of the bolt.

 

If the mount becomes worn and loose ,it can contact the bolt. The bolt has to to be tight against the center section of the rubber of the mount so only the rubber part moves.
One part is attached to the chassis and the other part is attached to the engine.