These thread into the yoke and tighten the arm support in place.

We sell over 100 different used parts. If you want to figure out what is wrong with your chair, and how to fix it, buy our twenty minute diagnosis via email, text, video or call for $20.00, purchase at this link, https://rcannon8156.mystorefront.online/?l=1&product=10059&action=product

If you are in Florida we might be able to come to your location and repair your chair for you, if you are interested please ask us for a quote, so we can let you know how much it will cost.

Please let us know if you have any questions.

These are pre-owned, shows wear, but ready to be put to work on your chair.

This is for twenty bolts that screw tight the arm support to the yoke. (Look a the circled number 53 in the last photo.) They are 22 mm long, the head is 16 mm wide, and the thread is 8 mm thick. They fit the size A, B and C chairs and are genuine OEM pieces for the Aeron office furniture line by Herman Miller.

If you want multiple parts we can combine shipping.