Abstract: Single filament fiber optic cables are aligned within a connector to prov low-loss light transmittance from one to the other. Since it is virtually impossible to drill holes in a connector as small as the five thousandths of an inch typical diameter of a single filament fiber optic cable, the fiber optic cable ends are bonded within a section of micro-tubing, of the stainless steel type used for the micro syringe portion of a hyperdermic needle. The single filament fiber optic cable ends thus bonded within the micro-tubing, are received within terminal members of a selected metal material having internal bores which are readily drilled by conventional means to receive the micro-tubing having the ends of the fiber optic cables bonded therein. This assembly is made by force fit and each such assembled terminal of the single filament fiber optic cable is optically ground and polished at its end.