Which of these replacement parts unsafe to get used & I should instead buy new?

The rear left suspension parts of my car were damaged in a collision with the highway median. Had subaru take a look at it and came back with these parts being replaced. I contacted BRZ part outs and plan to get as many parts as possible used.

I was wondering if any of these parts I should purchase new or aftermarket instead for safety and reliability? (for example the nut)

The rear left suspension parts of my car were damaged in a collision with the highway median. Had subaru take a look at it and came back with these parts being replaced. I contacted BRZ part outs and plan to get as many parts as possible used.

I was wondering if any of these parts I should purchase new or aftermarket instead for safety and reliability? (for example the nut)