Includes
Automatic Nonpowered Valves; Gate, Globe, Angle, Check, and Relief Valves; Cocks.

Excludes
Fire Hydrants (FSC 4210) Sprinkler Heads (FSC 4210); Valves specifically designed for use with fire fighting equipment (FSC 4210); plumbing equipment and the like (FSC 4540)

Possible NAICS Codes
332911 – Industrial Valve Manufacturing
336310 – Motor Vehicle Gasoline Engine and Engine Parts Manufacturing
332919 – Other Metal Valve and Pipe Fitting Manufacturing
332912 – Fluid Power Valve and Hose Fitting Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333618 – Other Engine Equipment Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
336411 – Aircraft Manufacturing
333914 – Measuring, Dispensing, and Other Pumping Equipment Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing

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
333914 – Measuring, Dispensing, and Other Pumping Equipment Manufacturing
333120 – Construction Machinery Manufacturing
332912 – Fluid Power Valve and Hose Fitting Manufacturing

Includes
Electric Motor Operated Valves; Hydraulic Operated Valves; Solenoid Operated Valves.

Excludes
Engine Intake and Exhaust valves;(FSC 2990, 2815); Valves specifically designed for use with fire fighting equipment,(FSC 4210); plumbing equipment, and the like (FSC 4540).

Possible NAICS Codes
332911 – Industrial Valve Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332919 – Other Metal Valve and Pipe Fitting Manufacturing
332912 – Fluid Power Valve and Hose Fitting Manufacturing
333618 – Other Engine Equipment Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
336310 – Motor Vehicle Gasoline Engine and Engine Parts Manufacturing
333612 – Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing
333120 – Construction Machinery Manufacturing
332991 – Ball and Roller Bearing Manufacturing

Includes
Air Duct, Metallic, Nonmetallic, and Textile Fiber Hoses and their assemblies; Flexible Tubing and their assemblies.

Excludes
Conduit and their assemblies (FSC 5975); Laboratory Tubes (FSC 6640); Medical and Surgical Tubes (FSC 6515); Rigid Tubing and their assemblies (FSC 4710).

Possible NAICS Codes
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
326220 – Rubber and Plastics Hoses and Belting Manufacturing
333618 – Other Engine Equipment Manufacturing
336411 – Aircraft Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333120 – Construction Machinery Manufacturing
332919 – Other Metal Valve and Pipe Fitting Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
332510 – Hardware Manufacturing
313320 – Fabric Coating Mills

Includes
Locknuts; Eye Nuts; Plain Nuts; Castellated Nuts; Wing Nuts; Plate Nuts; Push on Nuts; Concave and Convex Washers; Flat Washers; Keyed Washers; Lock Washers; Shouldered Washers; Split Washers.

Excludes
Bearing Thrust Washers (FSC 3120); Shims (FSC 5365); Ring Spacers (FSC 5365); Plate Spacers (FSC 5365); Lock Rings (FSC 5365).

Notes
Nuts and washers, including specially designed, are to be classified in this FSC. a. Nuts are a small metal block made in a variety of shapes such as square and hexagonal which is drilled and internally threaded. b. Washers are a perforated piece of metal, leather, or other materials of various shapes or forms. They are used primarily as a seat for a bolt, nut, screw, rivet or nail to distribute pressure and prevent endwise motion over an area and/or to prevent movement between two parts by means of restraining features created by the shape of its edges.

Possible NAICS Codes
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333618 – Other Engine Equipment Manufacturing
336411 – Aircraft Manufacturing
332510 – Hardware Manufacturing
331529 – Other Nonferrous Metal Foundries (except Die-Casting)
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
488190 – Other Support Activities for Air Transportation
332112 – Nonferrous Forging
332721 – Precision Turned Product Manufacturing

Possible NAICS Codes
332510 – Hardware Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
488190 – Other Support Activities for Air Transportation
332912 – Fluid Power Valve and Hose Fitting Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
336411 – Aircraft Manufacturing
332112 – Nonferrous Forging

Possible NAICS Codes
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
336411 – Aircraft Manufacturing
333618 – Other Engine Equipment Manufacturing
332721 – Precision Turned Product Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332510 – Hardware Manufacturing
332112 – Nonferrous Forging
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
332912 – Fluid Power Valve and Hose Fitting Manufacturing
488190 – Other Support Activities for Air Transportation

Possible NAICS Codes
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
322299 – All Other Converted Paper Product Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332510 – Hardware Manufacturing
332112 – Nonferrous Forging
333618 – Other Engine Equipment Manufacturing
336412 – Aircraft Engine and Engine Parts Manufacturing
423710 – Hardware Merchant Wholesalers
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
336411 – Aircraft Manufacturing

Includes
Eyelets; Grommets; Aircraft Cowling Fasteners; Textile Fasteners; Retaining Rings; Threaded Inserts.

Possible NAICS Codes
332510 – Hardware Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333618 – Other Engine Equipment Manufacturing
332119 – Metal Crown, Closure, and Other Metal Stamping (except Automotive)
336411 – Aircraft Manufacturing
339993 – Fastener, Button, Needle, and Pin Manufacturing
326130 – Laminated Plastics Plate, Sheet (except Packaging), and Shape Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
488190 – Other Support Activities for Air Transportation

Includes
Cabin Supercharging Equipment; Canisters; Cylinder Assemblies; Masks; Fixed Oxygen Systems; Specially Designed Aircraft Valves; Cabin Pressure Regulators; Heat Exchangers; Air Expansion Turbines; Aircraft Heaters; Ventilating System Components; Air Conditioning and Heating Duct Assemblies; Thermal De-icing Equipment; Cabin and Compartment Pressurizing Equipment; Air Diffusers; Cabin Pressure Selectors; Liquid Oxygen Converters.

Excludes
Oxygen Pressure Signals and Warning Devices; Tubing; Ground Type Heaters and Coolers; Pressurizing Equipment other than that used for Cabin and Compartment Pressurization; Fluid De-icing Equipment; Valves specifically designed for use with Aircraft Engines, Guided Missiles, and Guided Missile Engines.

Notes
This class includes components specifically designed for use in aircraft air conditioning, heating, and pressurizing equipment. Also included are specially designed components of oxygen breathing systems used in aircraft.

Possible NAICS Codes
336411 – Aircraft Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332510 – Hardware Manufacturing
333612 – Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
332991 – Ball and Roller Bearing 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
339999 – All Other Miscellaneous Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
423710 – Hardware Merchant Wholesalers
444140 – Hardware Retailers
333618 – Other Engine Equipment Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
336411 – Aircraft Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing

Description
Aircraft Hydraulic, Vacuum and De-icing System Components

Includes
Hydraulic and Pneumatic Accumulators, Pumps, Motors, Actuating Cylinders, and Filters; De-icing Boots; Fluid Type De-icing Pumps, Valves and Filters; Vacuum System Oil Separators; Pneumatic Pressurization Equipment other than that for pressurizing cabins and compartments.

Excludes
Jet Engine Hydraulic Components (FSC 2840); Valves specifically designed for air conditioning, heating. ventilating, cabin pressurizing, and thermal de-icing (FSC 1660); Valves specifically designed for use with Aircraft Engines (FSC 2840); Guided Missiles and Guided Missile Engines (FSC 1338); Landing Gear (FSC 1620), Wheel and Brake System Components (FSC 1630); Oxygen Breathing System Components (FSC 1660); In-flight Refueling System Hydraulic components (FSC 1680); Specifically designed hydraulic power steering system components (FSC 1620).

Notes
This class includes only those components specifically designed for aircraft use.

Possible NAICS Codes
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
336411 – Aircraft Manufacturing
332991 – Ball and Roller Bearing Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
488190 – Other Support Activities for Air Transportation

Includes
Sails; Chain Ladders; Rope Ladders; Marine Furniture.

Possible NAICS Codes
336611 – Ship Building and Repairing
441222 – Boat Dealers
333618 – Other Engine Equipment Manufacturing
332322 – Sheet Metal Work Manufacturing
333923 – Overhead Traveling Crane, Hoist, and Monorail System Manufacturing
333914 – Measuring, Dispensing, and Other Pumping Equipment Manufacturing
332911 – Industrial Valve Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product 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

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

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

Includes
Truck Mounted and Trailer Mounted Compressors.

Excludes
Refrigeration Compressors (FSC 4130).

Possible NAICS Codes
333912 – Air and Gas Compressor Manufacturing
333914 – Measuring, Dispensing, and Other Pumping Equipment Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
333618 – Other Engine Equipment Manufacturing
333120 – Construction Machinery Manufacturing
333415 – Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333996 – Fluid Power Pump and Motor Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing