The 3-826656-6: Unshrouded, push-pull fastening means it mates with standard AMPMODU receptacles without a locking latch, so the assembly relies on the board-to-board stack height or cable strain relief for retention.
Gold Mating Finish for Moderate Cycle Life
The mating contact finish is gold with a thickness of 3.90 µinch (0.099 µm) over brass. The post (solder tail) is tin-plated at 118.1 µinch (3.00 µm), which wets well during wave or hand soldering.
The 0.110" (2.79mm) insulation height leaves room for trace routing under the header body.