The header carries gold or gold GXT™ plating at 30.0 µ" (0.76 µm) on the mating surface, rated for 5 A per contact at 110 V.
The 0.100" (2.54 mm) pitch is standard for square pin headers — your board footprint is a 26-pad, two-row pattern with 0.100" between centers and 0.100" between rows.
The header uses phosphor bronze contacts in a black UL94 V-0 rated insulation body. The unshrouded design means the square pins are exposed.
