The 1-179958-6: A polarizing key on the housing prevents mis-mating with the wrong plug, which saves a rework trip on the line.
Against the 1-2069882-6, a 6-position dual-row receptacle at 5.08 mm pitch with 7.62 mm row spacing, the 1-179958-6 uses a single row at 10.16 mm pitch — the wider pitch gives more creepage per circuit for power duty, while the dual-row version packs more positions into the same board edge. For a 6-circuit power harness where each position needs isolation, the single-row 10.16 mm housing is the cleaner fit.
This housing mates with the matching Dynamic D-5200 series plug — the polarizing key ensures the correct plug half engages before the contacts seat. The crimp terminals are ordered separately; the housing is a free-hanging (in-line) design with no board-mount features, so it terminates a cable assembly that plugs into a panel or board-mount header.