The 4-174639-6: Mating contacts are tin-plated phosphor bronze with 31.5 µin of tin on the mating surface, suited for signal-level duty where repeated mating cycles are infrequent.
1.25 mm pitch — dual-row routing density
The 1.25 mm pitch and matching 1.25 mm row spacing place the 16 positions in a compact footprint that routes between the pads on a standard PCB trace-and-space budget.
