Includes
Railroad Rails; Railroad Tie Plates; Railroad Turnouts and Components; Railroad Spikes.

Excludes
Ballast (FSC 5610); Railroad Ties (FSC 5510).

Possible NAICS Codes
336510 – Railroad Rolling Stock Manufacturing
326199 – All Other Plastics Product Manufacturing
331110 – Iron and Steel Mills and Ferroalloy Manufacturing
321114 – Wood Preservation
336611 – Ship Building and Repairing
331210 – Iron and Steel Pipe and Tube Manufacturing from Purchased Steel
332323 – Ornamental and Architectural Metal Work Manufacturing
332313 – Plate Work Manufacturing
332312 – Fabricated Structural Metal Manufacturing
327390 – Other Concrete Product Manufacturing

Includes
Brake Beams and Components; Couplers; Trucks and Components; Journals and Components; Wheel Sets and Components.

Excludes
Railroad Furniture (FSG 71).

Possible NAICS Codes
336510 – Railroad Rolling Stock Manufacturing
532120 – Truck, Utility Trailer, and RV (Recreational Vehicle) Rental and Leasing
334519 – Other Measuring and Controlling Device Manufacturing
336110 – Automobile and Light Duty Motor Vehicle Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
812930 – Parking Lots and Garages
811191 – Automotive Oil Change and Lubrication Shops
811111 – General Automotive Repair
488210 – Support Activities for Rail Transportation
484110 – General Freight Trucking, Local

Includes
Hand Grease Guns; Centralized Lubrication Systems; Hydrostatic Lubricators; Oil and Gasoline Dispensing Pumps; Fuel Oil Dispensing Pumps; Hand Oilers; Grease Dispensers; Pressure Gun Attachments; Sight Feed Lubricators.

Excludes
Alemite and Lubrication Fittings (FSC 4730).

Possible NAICS Codes
333914 – Measuring, Dispensing, and Other Pumping Equipment Manufacturing
333618 – Other Engine Equipment Manufacturing
331318 – Other Aluminum Rolling, Drawing, and Extruding
333912 – Air and Gas Compressor Manufacturing
339993 – Fastener, Button, Needle, and Pin Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332919 – Other Metal Valve and Pipe Fitting Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing

Includes
Trailed Cars; Self-Propelled Cars.

Excludes
Aerial Tramway Cars.

Notes
This class includes only complete rail cars. End items, assemblies, parts, attachments, or accessories for use in or on rail cars are classified in classes other than this class.

Possible NAICS Codes
336510 – Railroad Rolling Stock Manufacturing
336999 – All Other Transportation Equipment Manufacturing
488210 – Support Activities for Rail Transportation
482111 – Line-Haul Railroads
336211 – Motor Vehicle Body Manufacturing
333248 – All Other Industrial Machinery Manufacturing
237990 – Other Heavy and Civil Engineering Construction

Excludes
Self-Propelled Cars.

Notes
This class includes only complete locomotives and tenders. End items, assemblies, parts, attachments, or accessories for use in or on locomotives and tenders are classified in classes other than this class.

Possible NAICS Codes
336510 – Railroad Rolling Stock Manufacturing
488210 – Support Activities for Rail Transportation
562112 – Hazardous Waste Collection
492110 – Couriers and Express Delivery Services
335910 – Battery Manufacturing
325992 – Photographic Film, Paper, Plate, Chemical, and Copy Toner Manufacturing

Description
Maintenance, Repair and Rebuilding of Equipment: Railway Equipment

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

Description
Right-of-Way Construction and Maintenance Equipment, Railroad

Includes
Rail Laying, Joining, and Shifting Equipment; Self Propelled and Car Mounted Cranes.

Excludes
Hand Tools (FSG 51).

Possible NAICS Codes
336212 – Truck Trailer Manufacturing
336510 – Railroad Rolling Stock Manufacturing
333120 – Construction Machinery Manufacturing
237990 – Other Heavy and Civil Engineering Construction
238910 – Site Preparation Contractors
488210 – Support Activities for Rail Transportation
336390 – Other Motor Vehicle Parts Manufacturing
336110 – Automobile and Light Duty Motor Vehicle Manufacturing
333996 – Fluid Power Pump and Motor Manufacturing
333924 – Industrial Truck, Tractor, Trailer, and Stacker Machinery Manufacturing

Possible NAICS Codes
331210 – Iron and Steel Pipe and Tube Manufacturing from Purchased Steel
331110 – Iron and Steel Mills and Ferroalloy Manufacturing
332111 – Iron and Steel Forging
331511 – Iron Foundries
336510 – Railroad Rolling Stock Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing

Includes
Propulsion Shafts; Ship Propellers; Marine Transmissions, Reverse and Reduction Gear Type.

Excludes
Engines (FSC 2810, 2815); Turbines (FSC 2825, 2835, 2840).

Possible NAICS Codes
333618 – Other Engine Equipment Manufacturing
336415 – Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing
336612 – Boat Building
336611 – Ship Building and Repairing
336214 – Travel Trailer and Camper Manufacturing
333613 – Mechanical Power Transmission Equipment Manufacturing
331529 – Other Nonferrous Metal Foundries (except Die-Casting)
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
339991 – Gasket, Packing, and Sealing Device Manufacturing

Includes
RESURFACING

Possible NAICS Codes
237310 – Highway, Street, and Bridge Construction
115310 – Support Activities for Forestry
237990 – Other Heavy and Civil Engineering Construction
236220 – Commercial and Institutional Building Construction
488210 – Support Activities for Rail Transportation
561210 – Facilities Support Services
238990 – All Other Specialty Trade Contractors
238110 – Poured Concrete Foundation and Structure Contractors
238910 – Site Preparation Contractors
488490 – Other Support Activities for Road Transportation

Description
Logistics Support Services

Possible NAICS Codes
541614 – Process, Physical Distribution, and Logistics Consulting Services
493190 – Other Warehousing and Storage

Description
Maintenance, Repair and Rebuilding of Equipment: Instruments and Laboratory Equipment

Possible NAICS Codes
811210 – Electronic and Precision Equipment Repair and Maintenance
334516 – Analytical Laboratory Instrument Manufacturing
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
561210 – Facilities Support Services
541380 – Testing Laboratories and Services
334515 – Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
334519 – Other Measuring and Controlling Device Manufacturing

Possible NAICS Codes
541330 – Engineering Services
541310 – Architectural Services
236220 – Commercial and Institutional Building Construction
237990 – Other Heavy and Civil Engineering Construction
238320 – Painting and Wall Covering Contractors
238110 – Poured Concrete Foundation and Structure Contractors
561990 – All Other Support Services
236115 – New Single-Family Housing Construction (except For-Sale Builders)
212321 – Construction Sand and Gravel Mining
541620 – Environmental Consulting Services

Possible NAICS Codes
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
541611 – Administrative Management and General Management Consulting Services
541380 – Testing Laboratories and Services
541990 – All Other Professional, Scientific, and Technical Services
481211 – Nonscheduled Chartered Passenger Air Transportation
541330 – Engineering Services
492110 – Couriers and Express Delivery Services
541620 – Environmental Consulting Services
541690 – Other Scientific and Technical Consulting Services
481111 – Scheduled Passenger Air Transportation

Includes
Expanded Metal Lath; Airplane Landing Mats; Traction Mats.

Possible NAICS Codes
423610 – Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers
339999 – All Other Miscellaneous Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing