A fiber optic adapter 10 for interconnecting two fiber connectors in coaxial alignment, each connector including a generally cylindrical ferrule holding an end of an optical fiber, the adapter comprising: a main body including an axial cavity defined by a top side-wall, a bottom side-wall, a right side-wall, and a left side-wall, the axial cavity extending between a first opening defined at a first end of the main body and a second opening defined at a second end of the main body, the first end configured to receive a first fiber optic connector through the first opening and the second end configured to receive a second fiber optic connector through the second opening for mating with the first fiber optic connector; a ferrule alignment structure located within the axial cavity, the ferrule alignment structure including a sleeve mount arranged to receive a ferrule sleeve, wherein that sleeve mount defines a first end, a second end, and a center portion, wherein the first end of the sleeve mount is positioned toward the first end of the main body and the second end of the sleeve mount is positioned toward the second end of the main body, the sleeve mount further defining an axial bore that defines a longitudinal axis extending from the first end of the sleeve mount toward the second end of the sleeve mount, the axial bore configured to receive and coaxially align the ferrules of the first and second fiber optic connectors when the connectors are inserted into the adapter, characterized in that: the sleeve mount and the main body of the fiber optic adapter are unitarily molded as a single piece, wherein the sleeve mount that is unitarily molded as a single piece with the main body of the fiber optic adapter includes a first portion extending from the center portion of the sleeve mount toward the first end of the sleeve mount and a second portion extending from the center portion of the sleeve mount toward the second end of the sleeve mount, each of the first and second portions defining an inwardly extending finger arranged for capturing the ferrule sleeve within the axial bore once the sleeve is received within the bore, the inwardly extending finger of the first portion being positioned around the axial bore at a peripherally offset relationship with respect to the inwardly extending finger of the second portion along the longitudinal axis defined by the axial bore. a main body including an axial cavity defined by a top side-wall, a bottom side-wall, a right side-wall, and a left side-wall, the axial cavity extending between a first opening defined at a first end of the main body and a second opening defined at a second end of the main body, the first end configured to receive a first fiber optic connector through the first opening and the second end configured to receive a second fiber optic connector through the second opening for mating with the first fiber optic connector; a ferrule alignment structure located within the axial cavity, the ferrule alignment structure including a sleeve mount arranged to receive a ferrule sleeve, wherein that sleeve mount defines a first end, a second end, and a center portion, wherein the first end of the sleeve mount is positioned toward the first end of the main body and the second end of the sleeve mount is positioned toward the second end of the main body, the sleeve mount further defining an axial bore that defines a longitudinal axis extending from the first end of the sleeve mount toward the second end of the sleeve mount, the axial bore configured to receive and coaxially align the ferrules of the first and second fiber optic connectors when the connectors are inserted into the adapter, characterized in that: the sleeve mount and the main body of the fiber optic adapter are unitarily molded as a single piece, wherein the sleeve mount that is unitarily molded as a single piece with the main body of the fiber optic adapter includes a first portion extending from the center portion of the sleeve mount toward the first end of the sleeve mount and a second portion extending from the center portion of the sleeve mount toward the second end of the sleeve mount, each of the first and second portions defining an inwardly extending finger arranged for capturing the ferrule sleeve within the axial bore once the sleeve is received within the bore, the inwardly extending finger of the first portion being positioned around the axial bore at a peripherally offset relationship with respect to the inwardly extending finger of the second portion along the longitudinal axis defined by the axial bore. the sleeve mount and the main body of the fiber optic adapter are unitarily molded as a single piece, wherein the sleeve mount that is unitarily molded as a single piece with the main body of the fiber optic adapter includes a first portion extending from the center portion of the sleeve mount toward the first end of the sleeve mount and a second portion extending from the center portion of the sleeve mount toward the second end of the sleeve mount, each of the first and second portions defining an inwardly extending finger arranged for capturing the ferrule sleeve within the axial bore once the sleeve is received within the bore, the inwardly extending finger of the first portion being positioned around the axial bore at a peripherally offset relationship with respect to the inwardly extending finger of the second portion along the longitudinal axis defined by the axial bore.