Board-to-Board Receptacle for Dense Parallel Stacking
The 4-1734506-1: The mating contact finish is 10.0 µinch gold over the phosphor bronze base, which handles moderate mating cycles — think a few hundred insertions over the product life, typical for a mezzanine card that gets swapped during rework or field upgrade.
Footprint and Stack-Height Planning
This is a through-hole receptacle with a 0.102" (2.60 mm) post length, so the PCB hole depth and solder fillet height need to clear the opposite-side components. In a high-vibration environment, a secondary mechanical anchor (board standoff or screw) is worth planning into the layout.