Includes
Fuel Gases.

Excludes
Military Chemical Gases; Medical Gases (for medical gases use code 6835); Empty Gas Cylinders and their caps, valves, and valve spare parts.

Possible NAICS Codes
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
325120 – Industrial Gas Manufacturing
211130 – Natural Gas Extraction
324110 – Petroleum Refineries
221210 – Natural Gas Distribution

Description
Gas Services

Possible NAICS Codes
221210 – Natural Gas Distribution
211130 – Natural Gas Extraction
221122 – Electric Power Distribution
221118 – Other Electric Power Generation
221112 – Fossil Fuel Electric Power Generation
926130 – Regulation and Administration of Communications, Electric, Gas, and Other Utilities

Includes
Light Burner Fuels; Diesel Fuels, Kerosene; Military Specification Type Residuals; Special and Heavy Grade Turbine Vessel Propulsion Fuels; Federal Specification Heavy Burner Fuels; Bunker "C" Commercial Grade Fuel; Heavy Fuel and other Black (Boiler Type) Fuels; Illuminating Oils.

Possible NAICS Codes
324110 – Petroleum Refineries
457210 – Fuel Dealers
324191 – Petroleum Lubricating Oil and Grease Manufacturing
213112 – Support Activities for Oil and Gas Operations
324199 – All Other Petroleum and Coal Products Manufacturing
424720 – Petroleum and Petroleum Products Merchant Wholesalers (except Bulk Stations and Terminals)

Includes
All Aviation Gasoline; JP-1, 3, 4, and 5 Jet Fuel; Combat Vehicle and Automotive Gasoline (all types and grades); Liquid Propellants, Bulk; Liquid Propellants, predetermined to specify quantity and quality, packaged in reusable containers.

Excludes
Solid Propellants; Liquid Propellants, encased in consumable containers, for insertion into missile propulsion systems as integral parts.

Notes
This class includes liquid propellants with more than 50% or higher petroleum content.

Possible NAICS Codes
324110 – Petroleum Refineries
457210 – Fuel Dealers

Description
Other Utilities

Possible NAICS Codes
221320 – Sewage Treatment Facilities
517111 – Wired Telecommunications Carriers
221310 – Water Supply and Irrigation Systems
221122 – Electric Power Distribution
926130 – Regulation and Administration of Communications, Electric, Gas, and Other Utilities
221210 – Natural Gas Distribution
516210 – Media Streaming Distribution Services, Social Networks, and Other Media Networks and Content Providers
561210 – Facilities Support Services
562111 – Solid Waste Collection
221112 – Fossil Fuel Electric Power Generation

Includes
Naphtha Solvents; Water Softening Compounds; Tanning Materials, Natural or Synthetic; Dextrines and Starches; Inedible Gelatins; Acetone; Propellant Chemicals, Bulk not specialized solely for Guided Missile Use.

Excludes
Medicinal Chemicals; Gases; Foundry Dextrines; Radiographic and photographic Chemicals; In Vitro Diagnostic Substances and Reagents.

Possible NAICS Codes
324191 – Petroleum Lubricating Oil and Grease Manufacturing
325998 – All Other Miscellaneous Chemical Product and Preparation Manufacturing
325611 – Soap and Other Detergent Manufacturing
325199 – All Other Basic Organic Chemical Manufacturing
325180 – Other Basic Inorganic Chemical Manufacturing
325612 – Polish and Other Sanitation Good Manufacturing
325910 – Printing Ink Manufacturing

Description
Maintenance, Repair and Rebuilding of Equipment: Railway Equipment

Possible NAICS Codes
488210 – Support Activities for Rail Transportation
541350 – Building Inspection Services
237990 – Other Heavy and Civil Engineering Construction
336510 – Railroad Rolling Stock Manufacturing
211130 – Natural Gas Extraction
811121 – Automotive Body, Paint, and Interior Repair and Maintenance
811198 – All Other Automotive Repair and Maintenance
238210 – Electrical Contractors and Other Wiring Installation Contractors
333517 – Machine Tool Manufacturing
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

Description
Electric Services

Possible NAICS Codes
221122 – Electric Power Distribution
221112 – Fossil Fuel Electric Power Generation
221118 – Other Electric Power Generation
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
221121 – Electric Bulk Power Transmission and Control
221210 – Natural Gas Distribution
926130 – Regulation and Administration of Communications, Electric, Gas, and Other Utilities
238210 – Electrical Contractors and Other Wiring Installation Contractors

Description
Solid Fuel Handling Services

Possible NAICS Codes
211130 – Natural Gas Extraction
213112 – Support Activities for Oil and Gas Operations
561210 – Facilities Support Services
562910 – Remediation Services
562998 – All Other Miscellaneous Waste Management Services
238210 – Electrical Contractors and Other Wiring Installation Contractors
238330 – Flooring Contractors
561990 – All Other Support Services
562112 – Hazardous Waste Collection

Includes
Liquid Level Float Instruments; Revolution Counters; Speedometers; Rotation Measuring Instruments and Apparatus; Oxygen Flow Indicators; Tachometers, including Engine Tachometers.

Excludes
Combination Instruments; (FSC 6695); Meteorological Instruments (FSC 6660); and Automatic Control Valves (FSG 48).

Possible NAICS Codes
334519 – Other Measuring and Controlling Device Manufacturing
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
333618 – Other Engine Equipment Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
333120 – Construction Machinery Manufacturing
334610 – Manufacturing and Reproducing Magnetic and Optical Media
333310 – Commercial and Service Industry Machinery Manufacturing

Possible NAICS Codes
221310 – Water Supply and Irrigation Systems
561210 – Facilities Support Services
221320 – Sewage Treatment Facilities
325998 – All Other Miscellaneous Chemical Product and Preparation Manufacturing
924110 – Administration of Air and Water Resource and Solid Waste Management Programs
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
211130 – Natural Gas Extraction
237110 – Water and Sewer Line and Related Structures Construction
561990 – All Other Support Services

Includes
Angledozers; Augers; Backhoes; Bullclams; Bulldozer-Shovels; Cranes; Grubbers; Loaders; Rakes; Rippers; Rollers; Scarifiers; Snow Removal Units; Snowplowes; Sweepers; Treedozers.

Possible NAICS Codes
333618 – Other Engine Equipment Manufacturing
333120 – Construction Machinery Manufacturing
333111 – Farm Machinery and Equipment Manufacturing
423830 – Industrial Machinery and Equipment Merchant Wholesalers
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
333612 – Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing
336110 – Automobile and Light Duty Motor Vehicle Manufacturing
333112 – Lawn and Garden Tractor and Home Lawn and Garden Equipment Manufacturing
333924 – Industrial Truck, Tractor, Trailer, and Stacker Machinery Manufacturing
336390 – Other Motor Vehicle Parts Manufacturing

Includes
Automotive Lifts; Wheel Aligners; Brake Service Equipment; Tire Maintenance and Repair Equipment; Test stands and test equipment specially designed for use with motor vehicles.

Excludes
Hand Tools (FSG 51); Lubrication and Fuel Dispensing Equipment (FSC 4930); Basic types of electrical and electronic test instruments, including those specifically designed, such as ammeters, voltmeters, ohmmeters, multimeters, and similar instruments as shown in the indexes in the FSC (FSC 6625).

Possible NAICS Codes
333310 – Commercial and Service Industry Machinery Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
334419 – Other Electronic Component Manufacturing
333618 – Other Engine Equipment Manufacturing
444110 – Home Centers
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
811111 – General Automotive Repair
336992 – Military Armored Vehicle, Tank, and Tank Component Manufacturing
333924 – Industrial Truck, Tractor, Trailer, and Stacker Machinery Manufacturing
332510 – Hardware Manufacturing

Possible NAICS Codes
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
334310 – Audio and Video Equipment Manufacturing
334220 – Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing
334290 – Other Communications Equipment Manufacturing
541519 – Other Computer Related Services
336411 – Aircraft Manufacturing
334111 – Electronic Computer Manufacturing
488190 – Other Support Activities for Air Transportation
541512 – Computer Systems Design Services

Includes
Laboratory Glassware; Laboratory Funnels; Laboratory Furnaces; Glass Beads; Laboratory White Sand; Litmus Paper; Paper Filters; Insect Transfixion Pins; Laboratory Glass Wool; Laboratory Furniture, except Dental Laboratory.

Excludes
Instruments covered by other classes in group 66; Dental Laboratory Equipment; Laboratory Scales and Balances; In Vitro Diagnostic Substances and Reagents.

Possible NAICS Codes
423450 – Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers
339999 – All Other Miscellaneous Manufacturing
334516 – Analytical Laboratory Instrument Manufacturing