Establishments primarily engaged in manufacturing electron tubes and tube parts. Establishments primarily engaged in manufacturing X-ray tubes and parts are classified in Industry 3844.
- Cathode ray tubes
- Electron beam (beta ray) generator tubes
- Electron tube parts, except glass blanks: bases, getters, and guns
- Electron tubes
- Gas and vapor tubes
- Geiger Mueller tubes
- Klystron tubes
- Light sensing and emitting tubes
- Magnetron tubes
- Photomultiplier tubes
- Picture tube reprocessing
- Planar triode tubes
- Receiving type electron tubes
- Television tubes
- Transmitting electron tubes
- Traveling wave tubes
- Tubes for operating above the X-ray spectrum (with shorter
- Vacuum tubes