An insert-molded fiber optic transmission component has at least one insert and a main body portion. The main body portion has at least one adjoining surface, a portion of the at least one adjoining surface lying in a first plane. The insert has an engaging face disposed against the outer edge surface and a reference surface adjacent the engaging face, where the reference surface lies in a second plane, and the adjoining surface is adjacent the engaging face of the at least one insert and the first and second planes being parallel to and offset from one another.