The TE Connectivity 229974-1 is a 50-position IDC plug from the CHAMP.085 series, built for mass-termination of ribbon cable in a free-hanging, in-line mount. The housing includes a 4-40 threaded flange on each end, so it bolts into a panel or mates securely with the matching receptacle's jack-screws.
Termination and Mating — What the IDC and Flange Mean for the Build
No stripping, no crimping, no solder. That makes it a fast, repeatable termination for multi-conductor cables in a harness shop or on a production line. The 4-40 threaded flange is not decorative: it lets you screw the plug to a panel or to the mating receptacle, which keeps the pair locked together under vibration. Without the jack-screws tightened, the IDC contacts can work loose over time in a moving assembly.