The single-wall shroud provides partial keying — enough to prevent a reversed mate without fully enclosing the pins, which keeps the connector profile lower than a four-wall box.
How it compares to close peers
The closest functional peer is 1394090-1: same 6 positions, right-angle through-hole, latch holder, and tin-plated contacts — but that part uses a 0.112" (2.85 mm) pitch and a full four-wall shroud. If your board is laid out for 2.50 mm pitch, 1394090-1 will not fit without a footprint change. Another sibling, 1376366-8, offers 8 positions at 0.087" (2.20 mm) pitch with a four-wall shroud and 5 A rating — higher current capacity and more circuits, but a different pitch family entirely.