ThreeBulls 12 Pieces 5.5mmx2.1mm DC Power Jack Female Panel Mount Connector

Using these panel connectors in our 3D printed light boxes and they are perfect! We will be buying these again and again!

Worked perfectly

I was needing power inlets that were compact in order to fit into a project without much depth, and these do the job well. The seem well made and soldered easily. It was necessary in my case to solder before fitting into a panel, and getting the nut over the soldered connections was then tricky, but bending the lugs slightly was possible without breakage and solved the issue.

I needed some fairly shallow jacks for a project in a small project box and these do the job. The only thing I don't like is the center pin isn't the split type but rather a solid pin so plugs with slightly wider center holes won't work well with them, you have to find plugs that are the right fit. But for the money they're OK.

I only needed two of these, to connect a DC control voltage from a PID controller to a Solid State Relay, via a double male patch-cord. These were inexpensive and now I have spares. Note that they are plastic. This has good and bad points; the good is that they are isolated from the chassis, so can be used without grounding to the metal chassis. This is sometimes needed to avoid stray currents from having multiple ground points. On the other hand, being plastic the threads could strip; that said, mine did not strip. The lugs are small and have a little hole to take a wire; they must be pre-tinned, as they took solder very readily.