The 93944-428HLF: It's a through-hole solder termination part meant for board-to-board stacking or wire-to-board via a mating receptacle. The 100 µinch tin plating on the mating face gives a solid oxide barrier for indoor environments, but it's not meant for frequent reconnects — tin frets under vibration if cycled often.
Sizing the Board Footprint and Stack Height
The post length below the insulator is 0.130" (3.30 mm) — that's the solder tail that goes through the PCB hole. This geometry works for a mezzanine stack where the mating receptacle has a matching depth. The push-pull fastening type means there's no latch — the retention comes from the friction of the pin-to-receptacle interface.
Mating and Termination Notes
The square male pins (0.025" square typical for the series) engage with the receptacle's dual-beam contacts.