Abstract: A pluggable assembly for printed circuit boards includes a mounting rail of generally U-shaped cross-sectional configuration having a base portion mounted on one face of the printed circuit board, and a pair of arm portions extending normal to the base portion for supporting a transversely arranged terminal block, and a conductive pin extending from the terminal block through an opening contained in the mounting rail base portion for connection with a conductive layer on the remote face of the printed circuit via a socket contact that extends through a corresponding opening contained in the printed circuit board.