With the rounded tip and smaller diameter ring connection that looks like a B-gauge 1/4" longframe patch cable, which is pretty standard for patchbays but different from the A-gauge 1/4" audio connectors used for 1/4"
TRS connections on equipment. The metal part in the
insulator between the tip and ring sections is probably related to it being self burnishing, it helps clean the contacts every time it is inserted or removed.
Audio Accessories,
ADC, Bittree, AVP,
Neutrik and others all offer compatible 1/4" longframe patchbays. The next step is deciding how the bay should be terminated, how the pairs should interact and how the
ground/
shield is addressed, there may be multiple options on each of these. My default is punchdown terminations with the tip, ring and
shield normals brought out, this can require more work but allows configuring the bay just about any way you want depending on how you
wire it. And if the bays may be reconfigured often I will often use 'broadcast'
jack fields where the actual wiring panel is on an umbilical so that it can be mounted to the rear rack
rail and thus more easily accessed. However, if you have known configurations as far as normalling, shields bused or not and so on then it can reduce the work required to order a bay configured for that. The same with terminations, if you're going to have a lot of wiring from a particular
point or it is a
portable application then it may be beneficial to get the bays with everything wired internally to multipin connectors on the rear panel.