It uses the standard 0.100" (2.54 mm) pitch on both rows, giving a 0.100" x 0.100" grid that matches common IDC ribbon cable receptacles and dual-row socket strips. Each phosphor bronze contact carries a 5 A rating, and the mating surface is plated with 30.0 µ" (0.76 µm) of gold or Gold GXT — a plating grade that handles moderate mating cycles in industrial environments without the contact resistance drift you get from tin-on-tin.
The right-angle orientation with a 0.190" (4.83 mm) insulator height and a 0.318" (8.08 mm) mating pin length gives a standard through-hole standoff; the 0.230" (5.84 mm) solder tail length is long enough for a standard PCB thickness but check your board stack if you are going through a thick backplane.
The 28-position count and dual-row layout are a direct match for a 28-contact IDC ribbon cable connector.