An electrical connector comprises dielectric material defining a passageway, a conductor element having a surface portion that is spaced from, but presented towards, the central axis of the passageway, and a composite rod of dielectric material and conductive material. The rod comprises an elongate core of dielectric material and an elongate body of conductive material secured to and extending lengthwise of the core. The rod can be inserted into the passageway along the central axes of the passageway. When the rod is fitted in the passageway, the body of conductive material engages the surface portion of the conductor element, so that electrically-conductive contact is established between the conductor element and the body of conductive material.