Includes
Compressor and Turbine Rotors; Blades; Combustion Chamber; Accessory Gear Box; Afterburner; Exhaust Cone; Reservoirs, Hydraulic; Tank, Oil.

Excludes
Oil, Air, Anti-icing, and Hydraulic Regulators, Valves, and Pumps specially designed for Gas Turbines and Jet Engines (FSC 2995); Control Assemblies, Push-Pull (FSC 2995); Engine Mounted Control Assemblies (FSC 2995); Fuel System Components (FSC 2915); Engine Electrical System Components (FSC 2925); Engine Cooling System Components (FSC 2935); Engine Air/Oil Cleaner/Filter/Strainers (FSC 2945).

Notes
Engines and Components classified in this FSC are intended for use as/on aircraft and/or guided missile prime movers.

Possible NAICS Codes
336412 – Aircraft Engine and Engine Parts Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
314999 – All Other Miscellaneous Textile Product Mills
332510 – Hardware Manufacturing
336411 – Aircraft Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
332991 – Ball and Roller Bearing Manufacturing
332996 – Fabricated Pipe and Pipe Fitting Manufacturing
488190 – Other Support Activities for Air Transportation

Includes
Carburetors; Fuel Pumps; Engine Fuel Filters; Fuel Controls, Jet Engine; Fuel Primers; Water Injection Controls and Valves; Fuel Valves; Fuel Flow Regulators; Components of Smoke Abatement Systems.

Excludes
Aircraft Fuel Tanks (FSC 1560); In-flight Refueling System Fuel Components (FSC 1680). Fuel System Components not specifically designed for use with Aircraft Engines or Missile Prime movers.

Notes
Fuel components specially designed for propulsion fuel systems, aircraft and missiles are to be placed in this FSC.

Possible NAICS Codes
336412 – Aircraft Engine and Engine Parts Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
334419 – Other Electronic Component Manufacturing
332991 – Ball and Roller Bearing Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
336411 – Aircraft Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
332510 – Hardware Manufacturing

Includes
Engine Dynafocal Suspension Mounts; Engine Cowling Mounts; Engine Mounted Control Assemblies; Pneumatic Starters; Push-Pull Control Assemblies; Specially designed Jet Engine Air, Oil, Anti-icing and Hydraulic Regulators; Valves and Pumps; Starting Units.

Excludes
Exhaust System; (FSC 1560); Jet Engine Hydraulic Reservoirs (FSC 2840); Jet Engine Oil Tanks (FSC 2840); Electrical Starters (FSC 2925); Cockpit Mounted Control Quadrants (FSC 1680); Aircraft Engine Covers (FSC 1730).

Notes
Items classified in this class must be specifically designed for use with aircraft or guided missile prime-movers only.

Possible NAICS Codes
336412 – Aircraft Engine and Engine Parts Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
336411 – Aircraft Manufacturing
333612 – Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing
332510 – Hardware Manufacturing
488190 – Other Support Activities for Air Transportation
332991 – Ball and Roller Bearing Manufacturing

Description
Maintenance, Repair and Rebuilding of Equipment: Engines, Turbines, and Components

Possible NAICS Codes
336412 – Aircraft Engine and Engine Parts Manufacturing
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
811111 – General Automotive Repair
333618 – Other Engine Equipment Manufacturing
336611 – Ship Building and Repairing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
488190 – Other Support Activities for Air Transportation
333611 – Turbine and Turbine Generator Set Units Manufacturing
811114 – Specialized Automotive Repair
811490 – Other Personal and Household Goods Repair and Maintenance

Includes
Magnetos; Igniters (Spark Plugs); Ignition Coils; Ignition Distributors; Engine Voltage Regulators; Ignition Harness Assemblies; Starting Motors for Engines; Engine Accessory Generators.

Excludes
Aircraft Lighting Fixtures (FSC 6220); and Auxiliary Aircraft Generators (FSC 6115).

Notes
Items designed for specific use on aircraft and guided missile prime movers are to be placed in this FSC.

Possible NAICS Codes
336412 – Aircraft Engine and Engine Parts Manufacturing
339950 – Sign Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
336320 – Motor Vehicle Electrical and Electronic Equipment Manufacturing
334419 – Other Electronic Component Manufacturing
336411 – Aircraft Manufacturing
488190 – Other Support Activities for Air Transportation
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
333611 – Turbine and Turbine Generator Set Units Manufacturing

Possible NAICS Codes
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
322299 – All Other Converted Paper Product Manufacturing
332510 – Hardware Manufacturing
332112 – Nonferrous Forging
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333618 – Other Engine Equipment Manufacturing
423710 – Hardware Merchant Wholesalers
336412 – Aircraft Engine and Engine Parts Manufacturing
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
336411 – Aircraft Manufacturing

Includes
Air Filters; Oil Filters; Strainers; Cleaners.

Excludes
Fuel Filters (FSC 2915); Items designed for other than Engines.

Notes
Items placed in this FSC should be specifically designed for use on aircraft or guided missile prime movers only.

Possible NAICS Codes
336412 – Aircraft Engine and Engine Parts Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
336411 – Aircraft Manufacturing
336390 – Other Motor Vehicle Parts Manufacturing
332991 – Ball and Roller Bearing Manufacturing
488190 – Other Support Activities for Air Transportation
334519 – Other Measuring and Controlling Device Manufacturing
332510 – Hardware Manufacturing

Includes
Control Assemblies, Push-Pull; Brace, Positioning Cargo Ramp Stowed on Board; Cockpit Mounted Control Quadrants; Actuators, Electromechanical and Mechanical; Ventilators; Relief Tubes; Map Holders; Aerial Glider Towing Accessories Attached to Aircraft; Belts, Safety and Lap; Harness, Shoulder and Safety; Litter Attaching Supports; Electric Windshield Wipers; Aircraft Onboard Inert Gas Generators; Aircraft Furniture; Aircraft Mounted Winches and Hoists; In-Flight Refueling System Components, including Fuel Components; Aircraft Curtains; Cable Tension Regulators; Sun Visors; Rear-View Mirrors; Mechanical Transmissions, Gearboxes and Constant Speed Drives Specially Designed for Aircraft.

Excludes
Engine Mounted Control Assemblies; Fitted Covers, Aircraft Pylons; Helicopter Rotor Brake System Components; Helicopter Automatic Stabilization Equipment.

Possible NAICS Codes
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
336411 – Aircraft Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
488190 – Other Support Activities for Air Transportation
336412 – Aircraft Engine and Engine Parts Manufacturing
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

Includes
General Purpose Oil Grease, Air, Liquid, Gas, and chemical Seals; Oakum; Prefabricated Gaskets and Seals designed for a single specific application.

Excludes
O-Rings (FSC 5331); Bulk material items, such as; Rubber, Cork, and Asbestos Sheets and Strips (FSG 93); Liquid Gasket Materials (RTV), Permatex, etc.) (FSG 80); RFI and EMI Seals and Gaskets (FSC 5999), and all Seal Retainers.

Notes
This FSC includes only seals and gaskets designed for standard use. Seals, gaskets and packing are made from materials specifically designed and constructed to resist deterioration from the action of heat, gas, chemicals, liquids, and used to fill a cavity and create a tight seal. Similar materials used to make seals, gaskets and packing are available in bulk form, refer to FSG 93, FSG 80, and FSG 83.

Possible NAICS Codes
339991 – Gasket, Packing, and Sealing Device Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
333618 – Other Engine Equipment Manufacturing
336411 – Aircraft Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
339950 – Sign Manufacturing
332510 – Hardware Manufacturing
424490 – Other Grocery and Related Products Merchant Wholesalers

Includes
Adapters; Bends; Caps; Clamps; Connectors; Couplings; Crosses; Elbows; Expansion Joints; Ferrules; Flanges; Laterals; Lubrication Fittings; Manifolds; Nipples; Nozzles; Outlets; Plugs; Reducers; Swing and Swivel Joints; Tees; Traps; Unions; Wyes.

Excludes
Air Conditioning-Heating Fittings (FSC 4520); Bituminized Fiber and Concrete Fittings (FSC 5630); Conduit Boxes and Fittings (FSC 5975); Downspout Fittings (FSC 5670); Medical and Surgical Fittings (FSC 6515); Laboratory Fittings (FSC 6640); Post Caps and Rail Ends (FSC 5660); Machine Thread Bushings and Plugs (FSC 5365).

Possible NAICS Codes
332996 – Fabricated Pipe and Pipe Fitting Manufacturing
332919 – Other Metal Valve and Pipe Fitting Manufacturing
326122 – Plastics Pipe and Pipe Fitting Manufacturing
333618 – Other Engine Equipment Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
332510 – Hardware Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing

Description
Hardware

Includes
Access Covers; Bumpers; Casters; Cabinet and Door Hardware; Clevises; Hinges; Latches; Straps and Strapping; Turnbuckles; Webbed Straps.

Excludes
Weapons System Hardware (5342).

Notes
Common hardware designed primarily for commercial use will be classified in this FSC. Hardware is the physical, tangible, and permanent components of end items that may not be classified elsewhere. It consists also of common items that are commonly used in construction and/or manufacturing (e.g., hinges, door locks).

Possible NAICS Codes
332510 – Hardware Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
339999 – All Other Miscellaneous Manufacturing
423710 – Hardware Merchant Wholesalers
333618 – Other Engine Equipment Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
336411 – Aircraft Manufacturing
444140 – Hardware Retailers
333120 – Construction Machinery Manufacturing

Includes
Shafts and Shafting; Collars; Gearshafts; Ball Joints; Actuating Cylinders.

Possible NAICS Codes
333613 – Mechanical Power Transmission Equipment Manufacturing
336411 – Aircraft Manufacturing
333618 – Other Engine Equipment Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332510 – Hardware Manufacturing
336350 – Motor Vehicle Transmission and Power Train Parts Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
333612 – Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing
333995 – Fluid Power Cylinder and Actuator Manufacturing

Includes
Appliance and Extension Cords; Electric Power and Distribution Cable with Attachments, Multiapplication; Common Components of Electrical Rotating Equipment, such as End Bells and Frames.

Possible NAICS Codes
334419 – Other Electronic Component Manufacturing
335311 – Power, Distribution, and Specialty Transformer Manufacturing
335139 – Electric Lamp Bulb and Other Lighting Equipment Manufacturing
335999 – All Other Miscellaneous Electrical Equipment and Component Manufacturing
332510 – Hardware Manufacturing
333618 – Other Engine Equipment Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
336411 – Aircraft Manufacturing
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing

Includes
Culvert Pipes; Culvert Pipe Connector Bands; Metallic Pipes; Plastic Pipes; Tubes and Rigid Tubing and their assemblies.

Excludes
Air Conditioning-Heating Pipes (FSC 4520); Asbestos and Cement, Bituminized Fiber, Clay and Concrete Pipes (FSC 5630); Conduit Pipes and their assemblies (FSC 5975); Downspout Pipes (FSC 5670); Exhaust Pipes (FSC 1560, 2990, and 4520); Fire Extinguishing Systems Pipes and Tubes and their assemblies (FSC 4210); Flexible Tubing (FSC 4720; Glass Tubing (FSC 6640, and 9340); Laboratory Tubes (FSC 6640); Medical and Surgical Tubes (FSC 6515).

Possible NAICS Codes
336411 – Aircraft Manufacturing
331210 – Iron and Steel Pipe and Tube Manufacturing from Purchased Steel
332996 – Fabricated Pipe and Pipe Fitting Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
331420 – Copper Rolling, Drawing, Extruding, and Alloying
326122 – Plastics Pipe and Pipe Fitting Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
333618 – Other Engine Equipment Manufacturing
488190 – Other Support Activities for Air Transportation
332510 – Hardware Manufacturing

Description
Turbosuperchargers and components

Includes
Turbosupercharged Regulators; Ground and Aircraft Engine Turbosuperchargers.

Excludes
Engine Integrated Superchargers (FSG 28).

Notes
All turbosuperchargers and their components not elsewhere classifiable will be classified in this FSC.

Possible NAICS Codes
333618 – Other Engine Equipment Manufacturing
336412 – Aircraft Engine and Engine Parts Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
333612 – Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
333415 – Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
333611 – Turbine and Turbine Generator Set Units Manufacturing