Rotationally adjustable fiber optic connector

A fiber optic connector assembly, comprising:

• an outer connector housing having a front mating end, a rear end and a through passage extending between the ends and defining an optic axis, the housing having a first key in the passage at a given position angularly about the optic axis;
• an inner optical fiber plug for terminating at least one optical fiber of a fiber optic cable, the plug being disposed in the through passage in the housing with a front ferrule portion of the plug terminating the optical fiber at the front mating end of the housing, with the fiber optic cable extending from the rear end of the housing, the front ferrule portion including a ferrule holder;
• a key ring rotatably mounted about the ferrule holder and fixable on the ferrule holder at selected positions of rotational adjustment, the key ring and the plug configured to enable the optical fiber and the plug to be inserted into the housing in only a single orientation, the key ring having a second key lockable with the first key on the housing once the key ring is fixed to the ferrule holder on the plug;
• and
• wherein the plug can be rotated to the optimum position of angular adjustment of the optical fiber relative to the optic axis, the key ring can be fixed to the ferrule holder on the plug with the second key on the key ring aligned with the first key on the housing, and the keys can be locked to fix the angular position of the plug relative to the housing.