While I was installing the 4th Dimensions Bed upgrade, the threads pulled out for the set screw that secures the rod to the support bracket. I designed this bracket to replace it.
It uses 3x M3 nuts, 1 M3x20, and the 2 stock screws per bracket.
The nuts should be able to be pressed in by hand, or if needed a small pliers can be used.
I would suggest printing a set of 4 and replacing all of them.
Print flat, with the 2 hex's facing up(not the clamp portion).