Herman Miller Aeron
It’s a chair. The armrest bolts snap.
Armrest #
This is the classic Aeron, the one where the arms slide up and down and lock with a hand-tightened knob. The bolts snap after prolonged use.
I’ve used this listing (opens in a new tab) before for replacement parts. It’s $40 which is incredibly steep. It includes:
- Bolt
- Knob
- Washer
- Ball bearing
- Plastic arm guard
- Friction clamp
- Metal bar
Reddit (opens in a new tab) (archived (opens in a new tab)) eventually produced the useful answer: the bolt is a standard 1/4"-28 × 2-1/2" fastener. Lowe’s, Home Depot, Menards (opens in a new tab), or any decent hardware store should have one.