The 1-480512-0: The friction lock gives a positive latch that resists vibration — a real help when you're re-pinning a harness on a conveyor or a machine tool that shakes.
The mating half is a MATE-N-LOK pin header (vertical or right-angle) with the same 6.10 mm pitch and 4 circuits. Termination is crimp, so you can re-pin it on site with a basic crimp tool and a terminal extraction tool — no soldering or special fixtures needed. The free-hanging (in-line) mount means it's designed to float in the harness, not bolt to a panel, which simplifies field replacement.