It is a free-hanging (in-line) female blade socket housing with three rows at a 0.236" (6.00 mm) pitch and 0.319" (8.10 mm) row spacing — a layout built for power distribution in wire harnesses rather than dense signal routing.
It accepts female blade socket terminals (crimp termination) that must be ordered separately. The 6.00 mm pitch and triple-row layout mate with the corresponding Power Triple Lock receptacle header. The 8.10 mm row spacing gives clearance for larger-gauge power wires between rows.
How It Stacks Against a 2-Row Sibling
The 6-1971876-7 (15 positions, 3 rows) shares the Power Triple Lock latch-holder design with the 1-1644055-3 (6 positions, 2 rows, 0.250" pitch). The key difference is row count and position density: the 3-row housing packs 15 circuits at a 6.00 mm pitch versus the 2-row sibling's 6 circuits at a 6.35 mm pitch. For a harness requiring more than six power circuits in a single connector, the 15-position plug saves a second connector and a splice point.