An electrical connector device has elongated narrow conductor plates provided on one side of an insulating base made of plastic, the conductor plates being bent upward so as to provide upwardly projecting conductor strips. The device also has a tubular insulating member having a bottom provided with apertures for receiving the conductor strips. Structures are provided on the insulating base and the tubular insulating member for fastening the tubular insulating member to the insulating base by a single snap fit action. The device further has a male engaging member having female connector members adapted to fit on the conductor strips. When the tubular insulating member is fixed to the insulating base, the base portions of the conductor strips are clamped between the portions of the lower surface of the bottom of the tubular insulating member around the apertures and the surface of the insulating base.