| 60 | 6000 | Historical FSC |
| 60 | 6004 | Rotary Joints |
| 60 | 6005 | Couplers, Splitters and Mixers |
| 60 | 6006 | Attenuators |
| 60 | 6007 | Filters |
| 60 | 6008 | Optical Multiplexers/Demultiplexers |
| 60 | 6010 | Fiber Optic Conductors |
| 60 | 6015 | Fiber Optic Cables |
| 60 | 6020 | Fiber Optic Cable Assemblies and Harnesses |
| 60 | 6021 | Fiber Optic Switches |
| 60 | 6025 | Fiber Optic Transmitters |
| 60 | 6026 | Fiber Optic Receivers |
| 60 | 6029 | Fiber Optic Repeaters |
| 60 | 6030 | Fiber Optic Devices |
| 60 | 6031 | Integrated Optical Circuits |
| 60 | 6032 | Fiber Optic Light Sources and Photo Detectors |
| 60 | 6033 | Fiber Optic Photo Detectors |
| 60 | 6034 | Fiber Optic Modulators/Demodulators |
| 60 | 6035 | Fiber Optic Light Transfer and Image Transfer Devices |
| 60 | 6040 | Fiber Optic Sensors |
| 60 | 6050 | Fiber Optic Passive Devices |
| 60 | 6060 | Fiber Optic Interconnectors |
| 60 | 6070 | Fiber Optic Accessories and Supplies |
| 60 | 6080 | Fiber Optic Kits and Sets |
| 60 | 6099 | Miscellaneous Fiber Optic Components |
