Beyerdynamic 930761 is the main cable screw to suit DT108 and DT109 connecting cord.
This Beyer screw comes standard with any genuine Beyerdynamic connecting cable, but if you’re changing cable configurations in between show, it’s quite plausible that this is the screw that goes missing right at the wrong moment.
M2 x 12mm Main Cable Screw for DT 108 / DT109/ DT190