Bolt that held the fixed end of a clamp was toast, as well as the plastic caps which housed them. This new set up allows for the easy removal and reversal of the clamp so that it can be used differently. 

I used a 3/8" carriage bolt, and a matching nut: https://www.mcmaster.com/bolts/carriage-bolts-4/thread-size~3-8-16/length~1-3-4/material~steel/finish~zinc-plated/fastener-strength-grade-class~grade-2/

happy printing!