The Molex 1731120273 is a jackscrew socket from the F-GSCH, FCT series, designed as a mating hardware accessory for standard D-sub connectors. It combines a 4-40 socket thread and an M3 screw in a single assembly, with a threaded portion length below the head of 0.315" (8.00 mm). This is the screw set that secures the male and female D-sub halves together — the jackscrew pulls the connector pair into full engagement and holds them against vibration. Hardware is included in the bulk package, so no separate washer or nut sourcing is needed for a typical panel-mount install.
Thread Size and Panel Fit
The jackscrew has a 4-40 socket thread and an M3 screw, with a 0.315" (8.00 mm) threaded portion below the head.