104550-2 is a fine-pitch surface-mount stacking connector designed for parallel board-to-board applications with 20 positions at 0.050 inch (1.27 mm) centers. The connector features a double-row vertical configuration with a glass-lined black keroclassic housing rated 94V-3, and phosphor bronze contacts plated with 0.00030 inch gold in the mating area and 0.000150 inch tin-lead on the solder tail, with nickel underplating. Key dimensional specifications include a length (A) of 0.644 inches (13.02 mm), width (B) of 0.450 inches (11.43 mm), and a depth (C) of 0.650 inches (16.51 mm), with plated-through holes of 0.042 inch diameter. This connector is ideal for compact, high-density interconnect applications in telecommunications, computing, and industrial equipment where reliable board-to-board connections are required.