ADAPTER FOR FIBER OPTIC CONNECTORS

A fiber optic connector adapter includes a base, a cap, and an interlock between the base and cap. The base includes surfaces that define an exterior and an interior passage between front and rear openings on opposing sides of the base. The cap is fastened to the base over one of the openings and has a port for a fiber optic connector, which includes a major dimension and a minor dimension narrower than the major dimension. The port includes only a single keyway, which is defined by an interior groove on the side of the port defining the major dimension. The interlock positions and holds the cap with the port oriented in a standard polarity. The interlock is releaseable and reengageable. The cap is configured to be released from the base, rotated 180-degrees, and refastened to the base, via the interlock. The keyway then has a reverse polarity.