The Molex 1063971502 is a simplex LC plug for multimode fiber, part of the 106397 series. It terminates a 2.0 mm cable with a zirconia ceramic ferrule, using a latch lock for retention in the mating receptacle. The white boot and gold housing color are standard visual cues for multimode LC — the boot color alone tells a technician this is not singlemode before they even check the label.
The 3 µm fiber core with 127 µm cladding is a specialty fiber geometry.
Mates with any standard LC simplex or duplex adapter (coupler) and LC receptacle — the latch lock clicks into the adapter's slot. Free-hanging (in-line) mounting means it's the cable-end plug, not a panel-mount or PCB-mount. The strain relief is built into the boot; the 2.0 mm cable diameter is the maximum the boot will grip cleanly. If your cable jacket is thicker or thinner, the boot won't seal or strain-relieve properly.