Includes
Maintenance stands designed for support of aircraft assemblies during repair or overhaul; Test Stands and Test Equipment specially designed for maintenance and repair of aircraft components such as: engines, generators, hydraulic systems, armament, automatic pilot, fire control, flight control and navigational systems.

Excludes
Hand Tools; Airfield Maintenance Platforms; Basic types of electrical and electronic test instruments, including those specially designed, such as ammeters, voltmeters, ohmmeters, multimeters, and similar instruments, as shown in the indexes to the FSC; Test Apparatus used for both communications and other electrical and electronic equipment.

Possible NAICS Codes
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332710 – Machine Shops
334419 – Other Electronic Component Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
332721 – Precision Turned Product Manufacturing
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
334515 – Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
488190 – Other Support Activities for Air Transportation
336411 – Aircraft Manufacturing
334519 – Other Measuring and Controlling Device Manufacturing

Includes
Checkout equipment and test equipment specially designed for use with guided missiles and guided missile remote control systems.

Excludes
Specially designed internal (built-in) checkout equipment for guided missile remote control systems; Basic types of electrical and electronic test instruments, including those specially designed, such as ammeters, voltmeters, ohmmeters, multimeters, and similar instruments, as shown in the indexes to the FSC; Test Apparatus used for both communications and other electrical and electronic equipment.

Possible NAICS Codes
332710 – Machine Shops
336419 – Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing
334419 – Other Electronic Component Manufacturing
332721 – Precision Turned Product Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332919 – Other Metal Valve and Pipe Fitting Manufacturing
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
334412 – Bare Printed Circuit Board Manufacturing
333996 – Fluid Power Pump and Motor Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing

Description
Guns, 75 mm through 125 mm

Includes
Breech Mechanisms; Mounts; Rammers.

Possible NAICS Codes
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
332710 – Machine Shops
336992 – Military Armored Vehicle, Tank, and Tank Component Manufacturing
332111 – Iron and Steel Forging
339993 – Fastener, Button, Needle, and Pin Manufacturing
339991 – Gasket, Packing, and Sealing Device Manufacturing
333515 – Cutting Tool and Machine Tool Accessory Manufacturing

Includes
Conduit; Raceways; Face Plates; Condulets; Outlet and Junction Boxes; Pole Line Hardware, not elsewhere classifiable.

Possible NAICS Codes
335999 – All Other Miscellaneous Electrical Equipment and Component Manufacturing
335932 – Noncurrent-Carrying Wiring Device Manufacturing
335931 – Current-Carrying Wiring Device Manufacturing
327110 – Pottery, Ceramics, and Plumbing Fixture Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
423610 – Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers
332510 – Hardware Manufacturing
238210 – Electrical Contractors and Other Wiring Installation Contractors
332710 – Machine Shops
335311 – Power, Distribution, and Specialty Transformer 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
339950 – Sign Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
333120 – Construction Machinery Manufacturing
326220 – Rubber and Plastics Hoses and Belting Manufacturing

Description
Guns, over 150 mm through 200 mm Includes Firing Platforms; Mounts; Gun Shields.

Includes
[Firing Platforms; Mounts; Gun Shields.]

Possible NAICS Codes
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
332710 – Machine Shops
332111 – Iron and Steel Forging
339993 – Fastener, Button, Needle, and Pin Manufacturing
333515 – Cutting Tool and Machine Tool Accessory Manufacturing
321920 – Wood Container and Pallet Manufacturing
339994 – Broom, Brush, and Mop Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
331110 – Iron and Steel Mills and Ferroalloy 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
423710 – Hardware Merchant Wholesalers
444110 – Home Centers
339999 – All Other Miscellaneous Manufacturing
333618 – Other Engine Equipment Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
336411 – Aircraft Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333120 – Construction Machinery 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
333310 – Commercial and Service Industry Machinery Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
333120 – Construction Machinery Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing

Includes
Adapters; Anchor Plates and Straps; Anodes; Bellows; Couplings; Control Rods; Access Doors; Fairleads; Mounts; Tie Rods; Yokes.

Excludes
Commercial Hardware (FSC 5340).

Notes
Hardware designed for weapon systems unique applications will be classified in this FSC.

Possible NAICS Codes
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
332510 – Hardware Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
336411 – Aircraft Manufacturing
333618 – Other Engine Equipment Manufacturing
333120 – Construction Machinery Manufacturing

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

Possible NAICS Codes
332710 – Machine Shops
332510 – Hardware Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333517 – Machine Tool Manufacturing
333515 – Cutting Tool and Machine Tool Accessory Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
332812 – Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
444140 – Hardware Retailers

Includes
Energizers; Engine Preheaters; Mooring Assemblies; Wheel Chocks; Beaching Equipment; Aileron, Elevator, and Rudder Locks; Passenger Loading Ramps; Maintenance Platforms; Aircraft Maintenance and Boarding Ladders; Aircraft Maintenance Slings and Hoists; Aircraft Fin Tilting Jacks; Airfield Specialized Lift Trucks and Trailers; Fitted Covers for Airframe Components; Aircraft Engine Covers.

Excludes
Airfield Specialized Trucks and Trailers designed primarily for transporting aircraft assemblies (FSC 1740); Maintenance Stands designed for support of aircraft assemblies during repair or overhaul (FSC 4920); Test Stands (FSC 4920); General Purpose Jacks (FSC 5120); Slings (FSC 3940), and Hoists (FSC 3950); Trailers (FSC 2330), Liquid Oxygen, Aircraft Servicing (FSC 1660).

Notes
This class excludes "vehicular components" such as those listed under FSCs 2520, 2530, 2540, 2590.

Possible NAICS Codes
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333519 – Rolling Mill and Other Metalworking Machinery Manufacturing
336411 – Aircraft Manufacturing
333924 – Industrial Truck, Tractor, Trailer, and Stacker Machinery Manufacturing
488190 – Other Support Activities for Air Transportation

Includes
Hardening, Annealing, Tempering, Normalizing, Cyaniding, and Carburizing Equipment; Furnaces, Flue Welding, Non- Thermal Stress Relieving Systems.

Possible NAICS Codes
333994 – Industrial Process Furnace and Oven Manufacturing
332710 – Machine Shops
332813 – Electroplating, Plating, Polishing, Anodizing, and Coloring
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
332811 – Metal Heat Treating
333517 – Machine Tool Manufacturing
332721 – Precision Turned Product Manufacturing
333414 – Heating Equipment (except Warm Air Furnaces) Manufacturing
334516 – Analytical Laboratory Instrument Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing

Includes
Gun Rifling Machines Speed Lathes.

Possible NAICS Codes
333517 – Machine Tool Manufacturing
332710 – Machine Shops
332510 – Hardware Manufacturing
333515 – Cutting Tool and Machine Tool Accessory Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
332216 – Saw Blade and Handtool Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
423830 – Industrial Machinery and Equipment Merchant Wholesalers
444110 – Home Centers

Includes
Communication Wire Dispenser Fabricating Machinery; Specialized Logging Equipment; Petroleum Refinery Machinery; Shoemaking Machinery; Production Type Impregnating Equipment.

Excludes
Opthalmic Lens Cutting and Grinding Machinery; Clothing Impregnating Equipment.

Possible NAICS Codes
333248 – All Other Industrial Machinery Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
333517 – Machine Tool Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
332710 – Machine Shops
334516 – Analytical Laboratory Instrument Manufacturing
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
334519 – Other Measuring and Controlling Device Manufacturing
333120 – Construction Machinery Manufacturing