5-104666-1 is a double-row, vertical board-mount receptacle connector designed for board-to-board interconnection in the AMPMODU System 50 connector family. The connector features a 20-position configuration with a .630 inch (16.00 mm) dimension A and a .145 inch (3.68 mm) post length, supporting .050 x .100 inch (1.27 x 2.54 mm) centerline spacing. The housing is constructed from glass-filled thermoplastic rated 94V-0, with copper alloy contacts featuring duplex plating: .000030 inch (0.00076 mm) gold in the mating area, .000150 inch (0.00381 mm) tin on solder posts, and .000050 inch (0.00127 mm) nickel underplating. This connector is ideal for applications requiring reliable board-to-board connections with consistent electrical performance and mechanical durability across industrial and commercial equipment.