6-104186-1 is a single row vertical unshrouded header connector from the AMPMODU System 50 interconnection system, designed for board-to-board applications. This 20-position header features a 0.050 inch [1.27 mm] centerline pitch with Dimension A of 1.015 inches [25.78 mm]. The housing is constructed from glass-filled thermoplastic with a black finish and UL 94V-0 flammability rating. Contacts are made of copper alloy with duplex plating featuring 0.000030 inch [0.00076 mm] gold in the mating area, 0.000150 inch [0.00381 mm] tin on solder posts, and 0.000050 inch [0.00127 mm] nickel underplating. This connector is ideal for PCB interconnection applications requiring reliable signal transmission in compact designs.