The 6.71 mm pitch and 3-row layout give each circuit generous space, making it straightforward to route larger-gauge wires into the crimp terminals.
Contacts are not included. The 3191 series accepts both male and female crimp contacts, so confirm which gender your mating half requires and add the terminals to the BOM line. A common sourcing miss is landing only the housing and stopping the build because the terminals are on a separate PO.
Pitch and Footprint — Why 6.71 mm Matters
The 0.264" (6.71 mm) pitch is wide compared to a typical 2.54 mm or 3.00 mm connector. That means the board-side footprint (if used with a PCB header) has generous clearance between pads, which simplifies routing and allows thicker traces for power circuits. The trade-off is physical size — a 12-position, 3-row plug at this pitch occupies more board edge than a denser alternative. The row spacing is the same 0.264" (6.71 mm), so the contact grid is square.