A pack of 5 high quality 1/4" mono jack sockets that we use as standard on our MFOS range of synth modules.
These sockets are the PCB mount version. We actually find the PCB tags are easier to solder wires to plus they directly fit our socket PCB breakout boards that simplify panel wiring.
These 1/4" panel mount mono sockets are very popular in the audio / music world where their reputation for quality is evident.
Featuring a 7mm long threaded metal busing and a closed switch contact (see datasheet, circuit option 2A).
Manufacturers part number 112APC