The 4-40 threaded flange on the housing allows panel-mounting with screws, giving a secure mechanical lock in vibration-prone environments like industrial control cabinets or rack-mounted equipment.
Termination is IDC, which requires a specific hand or pneumatic press tool to push the cable conductors into the insulation-displacement slots — no wire stripping or soldering is needed. The free-hanging (in-line) mounting style means the connector is used as a cable-end termination, not soldered to a PCB.