Abstract: An electrical connector is provided for selectively attaching an unbalanced data transmission conductor to electronic data processing equipment. The equipment includes a balanced data transmission terminal having a pair of slots and a grounded fitting that is disposed about the slots. The connector includes a base and one or more balanced conductor pins that are mounted to and extend from the base. The pins are inserted into the slots to establish electrical contact with the balanced data transmission conductor. A sleeve-like unthreaded ground conductor element is mounted to and extends from the base and is disposed about the pins. The ground conductor element is slidably engaged in electrical and mechanical contact with the grounded fitting when the pins are inserted into the slots. A jack is mounted to the base and is selectively engaged by a complementary plug formed at one end of the unbalanced data transmission conductor.