snug tightening knob for a dial indicator stand

thingiverse

The factory insert that comes with the hex bar isn't consistent, which means you might need to fine-tune your file accordingly. Alternatively, if the insert is loose, it can be secured using glue. This file is relatively small and takes about an hour and a half to print. I personally used PETG material, but any other suitable material would work just as well. Most indicator stands utilize identical sized parts, so this design should be compatible with all of them.