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What Is a NAICS 8-Digit Code?
All NAICS SIC Companies
SIC 6-Digit NAICS 8-Digit ISIC (International) NACE (Europe) SOC (Occupations) CIP (Programs) Extended SOC (O*NET)

NAICS 8-Digit Codes for "naics:33451"

Extended NAICS codes provide more specific industry categories within official 6-digit NAICS classifications, supporting more precise industry segmentation, market research, and business targeting. For official NAICS classification, use the 6-digit NAICS code.

Search this keyword in SIC 6-Digit codes.

companies

Verified U.S. companies available for purchase in this industry. Counts are based on primary business classifications.

Industry NAICS 8-Digit U.S. companies Add

Electromedical/Therapeutic Apprts (Manufacturing)

Parent: Electromedical and Electrotherapeutic Apparatus Manufacturing

 Extended NAICS 334510-01 companies 451companies

Hearing Aids (Manufacturing)

Parent: Electromedical and Electrotherapeutic Apparatus Manufacturing

 Extended NAICS 334510-02 companies 17companies

Laser Medical (Manufacturing)

Parent: Electromedical and Electrotherapeutic Apparatus Manufacturing

 Extended NAICS 334510-03 companies 22companies

Pacemakers-Cardiac (Manufacturing)

Parent: Electromedical and Electrotherapeutic Apparatus Manufacturing

 Extended NAICS 334510-04 companies 2companies

Automatic External Defibrillator Inf-Service (Manufacturing)

Parent: Electromedical and Electrotherapeutic Apparatus Manufacturing

 Extended NAICS 334510-06 companies 2companies

Radio Direction Finders (Manufacturing)

Parent: Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

 Extended NAICS 334511-02 companies 1companies

Aerospace Industries (Manufacturing)

Parent: Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

 Extended NAICS 334511-03 companies 1,114companies

Radar (Manufacturing) Service

Parent: Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

 Extended NAICS 334511-04 companies 14companies

Aircraft Radio Equipment (Manufacturing)

Parent: Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

 Extended NAICS 334511-05 companies 6companies

Missile/Rocket Instr/Guidance Equipment (Mfr) (Manufacturing)

Parent: Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

 Extended NAICS 334511-06 companies —

Simulators & Training Devices (Manufacturing)

Parent: Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

 Extended NAICS 334511-09 companies 21companies

Gps Navigation Systems & Services (Manufacturing)

Parent: Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

 Extended NAICS 334511-10 companies 107companies

Search Detection/Nav Systems Instr (Manufacturing)

Parent: Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

 Extended NAICS 334511-11 companies 483companies

Marine Instruments (Manufacturing)

Parent: Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

 Extended NAICS 334511-12 companies 3companies

Farm Equipment Global Positioning Sys (Manufacturing)

Parent: Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

 Extended NAICS 334511-13 companies 2companies

Automatic Contrls-Residential/Coml (Manufacturing)

Parent: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use

 Extended NAICS 334512-01 companies 52companies

Controls Control Systems/Regulators (Manufacturing)

Parent: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use

 Extended NAICS 334512-02 companies 325companies

Dampers (Manufacturing)

Parent: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use

 Extended NAICS 334512-03 companies 11companies

Energy Equipment Systems-Supplies (Manufacturing)

Parent: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use

 Extended NAICS 334512-04 companies 104companies

Static Controls (Manufacturing)

Parent: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use

 Extended NAICS 334512-05 companies 15companies

Cleaning Machine (Manufacturing)-Steam

Parent: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use

 Extended NAICS 334512-06 companies 27companies

Thermocouples (Manufacturing)

Parent: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use

 Extended NAICS 334512-07 companies 43companies

Instruments-Air Flow (Manufacturing)

Parent: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use

 Extended NAICS 334512-08 companies 3companies

Energy Management Control Systems (Manufacturing)

Parent: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use

 Extended NAICS 334512-09 companies 41companies

Analyzers-Industrial Control (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-01 companies 9companies

Annunciators (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-02 companies 2companies

Combustion Controls (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-03 companies 20companies

Dials (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-04 companies 1companies

Gas Equipment-Industrial (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-05 companies 20companies

Indicators-Dial (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-06 companies —

Industrial Measuring/Controlling Instr (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-07 companies 67companies

Infrared Equipment (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-08 companies 44companies

Moisture Detection Equipment (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-09 companies 7companies

Pneumatic Tube Equipment & Systems (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-10 companies 42companies

Production Control Systems (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-11 companies 24companies

Pyrometers (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-12 companies 4companies

Surge Protection Equipment (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-13 companies 14companies

Tank Measuring Devices (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-14 companies 1companies

Temperature Measuring Materials (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-15 companies 35companies

Indicators-Flow (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-16 companies 3companies

Industrial Process Cntrl Instrumentation (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-17 companies 79companies

Quality Control Testing Equipment (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-18 companies 2companies

Measuring Analyzing & Controlling Instrs (Manufacturing)

Parent: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

 Extended NAICS 334513-19 companies 414companies

Electro Mechanical Systems (Manufacturing)

Parent: Totalizing Fluid Meter and Counting Device Manufacturing

 Extended NAICS 334514-01 companies 10companies

Gauges & Gages (Manufacturing)

Parent: Totalizing Fluid Meter and Counting Device Manufacturing

 Extended NAICS 334514-02 companies 46companies

Gauges-Accessories & Parts (Manufacturing)

Parent: Totalizing Fluid Meter and Counting Device Manufacturing

 Extended NAICS 334514-03 companies 2companies

Measures-Dry Liquid Etc (Manufacturing)

Parent: Totalizing Fluid Meter and Counting Device Manufacturing

 Extended NAICS 334514-04 companies 3companies

Totalizing Fluid Mtrs/Cntng Device (Mfr) (Manufacturing)

Parent: Totalizing Fluid Meter and Counting Device Manufacturing

 Extended NAICS 334514-05 companies 34companies

Battery Tester Manufacturer & Sales

Parent: Totalizing Fluid Meter and Counting Device Manufacturing

 Extended NAICS 334514-06 companies 3companies

Meter (Manufacturing) Suppliers

Parent: Totalizing Fluid Meter and Counting Device Manufacturing

 Extended NAICS 334514-07 companies 9companies

Turned Parts-Precision (Manufacturing)

Parent: Totalizing Fluid Meter and Counting Device Manufacturing

 Extended NAICS 334514-08 companies 4companies

Automobile Diagnostic Service Equipment (Manufacturing)

Parent: Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals

 Extended NAICS 334515-01 companies 7companies

Calibration Devices (Manufacturing)

Parent: Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals

 Extended NAICS 334515-02 companies 4companies

Instrs-Measuring/Testing Elec (Manufacturing)

Parent: Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals

 Extended NAICS 334515-03 companies 336companies

Instruments-Measuring (Manufacturing)

Parent: Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals

 Extended NAICS 334515-04 companies 79companies

Recording Instruments Ind/Scientfc (Manufacturing)

Parent: Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals

 Extended NAICS 334515-05 companies 28companies

Laboratory Analytical Instruments (Manufacturing)

Parent: Analytical Laboratory Instrument Manufacturing

 Extended NAICS 334516-01 companies 677companies

Laboratory Equipment & Supplies (Manufacturing)

Parent: Analytical Laboratory Instrument Manufacturing

 Extended NAICS 334516-02 companies 126companies

Laboratory Furniture (Manufacturing)

Parent: Analytical Laboratory Instrument Manufacturing

 Extended NAICS 334516-03 companies 16companies

Shielding-Magnetic Electrostatic (Manufacturing)

Parent: Irradiation Apparatus Manufacturing

 Extended NAICS 334517-01 companies 18companies

X-Ray Apparatus & Supplies (Manufacturing)

Parent: Irradiation Apparatus Manufacturing

 Extended NAICS 334517-02 companies 55companies

X-Ray Apparatus & Tubes (Manufacturing)

Parent: Irradiation Apparatus Manufacturing

 Extended NAICS 334517-03 companies 32companies

Acoustic/Vibration Instrumentation (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-01 companies 7companies

Air Quality Measuring Equipment (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-02 companies 16companies

Alcohol Breath Detectors (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-03 companies 21companies

Anemometers (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-04 companies 1companies

Booths-Toll & Parking Lot & Etc (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-05 companies 5companies

Compasses (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-06 companies 15companies

Drafting Equipment Manufacturers

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-07 companies 7companies

Dynamometers (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-08 companies 11companies

Hydrometers (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-09 companies 4companies

Weather Instruments (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-10 companies 6companies

Hygrometers (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-11 companies 2companies

Lie Detection Equipment (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-12 companies 1companies

Measuring Tapes & Rules (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-13 companies 1companies

Measuring/Controlling Devices NEC (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-14 companies 457companies

Photogrammetric Instruments (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-15 companies 1companies

Radioactivity Instruments Supplies/Service (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-16 companies 4companies

Rulers & Yardsticks (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-17 companies 2companies

Seismograph Equipment & Supplies (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-18 companies 10companies

Slide Rules (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-19 companies 1companies

Stress Relief Equipment & Service-Ind (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-20 companies 4companies

Surveying Instruments (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-21 companies 18companies

Synchronizers (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-22 companies —

Templates (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-23 companies 9companies

Testing Apparatus (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-24 companies 58companies

Thermometer Wells (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-25 companies 2companies

Thermostatic Bimetals (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-26 companies —

Turnstiles (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-28 companies 2companies

Vibration Control (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-29 companies 24companies

Clocks (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-30 companies 28companies

Filament Winding (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-31 companies 4companies

Time Cards Racks & Supplies (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-32 companies 1companies

Time Recorders & Systems (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-33 companies 26companies

Time Stamps (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-34 companies 4companies

Timing Devices (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-35 companies 6companies

Watch Cases (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-36 companies —

Watch Dials (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-37 companies 2companies

Watch Straps & Bands (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-38 companies 1companies

Watches Clcks Clockwork Etc/Parts (Manufacturing)

Parent: Other Measuring and Controlling Device Manufacturing

 Extended NAICS 334519-39 companies 16companies

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Other classifications

Search "naics:33451" in SIC 6-Digit codes →

Sources & methodology

NAICS definitions: U.S. Census Bureau, 2022

SIC definitions: OSHA SIC Manual

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