The 93944-127HLF: This pitch is the standard breadboard-compatible spacing, so the footprint matches common prototyping grids and mating receptacles like the BERGSTIK II socket strips.
Unshrouded Design and Board Fit
Being unshrouded, the pins are fully exposed — there is no plastic shroud to guide the mating half. This makes the header suitable for board-to-board stacking where the receptacle aligns directly over the pins, but it offers no keying or polarization against mis-mating. In a typical board-to-board stack, the receptacle's insulation height adds to this, so verify the total stack height against your enclosure clearance.