Connector apparatus and methods providing for “keep-out” functionality against improperly sized plugs or inserts are disclosed. In one embodiment the invention discloses a connector assembly incorporating an integrated keep-out feature associated with the housing. In one variant, the connector assembly comprises a modular jack connector, and the keep-out feature(s) is/are formed substantially within one or more the sidewall(s) of the housing, thereby simplifying its assembly and reducing its cost, as well as conserving on connector interior space. In another embodiment, the keep-out feature comprises an element disposed substantially within a plane parallel to the front face of the connector. Methods for manufacturing and using connectors with integrated keep-out features are also disclosed.