2-1734279-1 is a 25-position right-angle subminiature D-sub stacked PCB connector designed for hybrid and mixed-style applications. This connector features a 25-pin plug configuration mated with a 25-pin plug on the lower D-sub, with dimensions of 2.09 inches (53.10 mm) in width (D), 1.85 inches (47.04 mm) in height (E), and 0.750 inches (19.05 mm) in depth (F). The connector is equipped with 4-40 threaded inserts for board mounting and utilizes contact finish option A, which provides gold flash on the mating end and tin on the solder tails with overall nickel underplate. The housing is constructed from 94V-0 rated thermoplastic material with phosphor bronze or brass contacts, ensuring reliable electrical performance and durability. This connector is commonly used in stacked PCB applications requiring compact, high-density interconnections with secure mechanical fastening.