An enclosure I'm repurposing for a project has two 6.5mm round holes in its rear panel. I'm looking for some kind of panel-mount jack, with a corresponding plug, so I can connect the interior Arduino-based guts of the project with a couple of external devices.
The existing holes are fairly close together. I could probably drill them out to about 8mm but not much further.
The enclosure happens to be perfect in every other way. Solid, brushed aluminum surfaces, existing connectors for power and network, so I'm looking hard for a connector style that will just work with those two holes. "Find another enclosure" is a solution I'm hoping to sidestep. :)
Most of what I've seen are either 2 or 3 connector solutions (e.g. plain old 3.5 mm audio jacks), or the 4th conductor is a ground and contacts the outer part of the jack and therefore the enclosure body. Other obvious choices like MIDI or S-video style connectors are just too big.
Can someone recommend a connector style that fits this size hole?
One of the connectors will supply power and control to a servo that runs at 7.4 V and has a stall current of about 6 A, so it needs to be sufficiently robust to handle that load, worst case.