Abstract: In a fiber optic waveguide connector a plurality of sector jaw members, such as three elongated 120.degree. sector shaped jaw members are arranged around the end portion of the fiber optic waveguide to be connected. An elastic O-ring encircles the jaw members for clamping the jaw members around the outer periphery of the fiber optic waveguide which is to be aligned with a second optical element, such as a light emitting diode, or other optical transducer including another fiber optic waveguide. The clamped assembly of sector jaw members and fiber optic waveguide is disposed within a cylindrical bore in a connector housing structure. The jaw members are independently radially adjusted by means of a plurality of adjustment screws arranged around and passing through the housing to obtain precise axial alignment of the fiber optic waveguide being connected to the second optical element.