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
332721 – Precision Turned Product Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
334515 – Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
488190 – Other Support Activities for Air Transportation
336411 – Aircraft Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery 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
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
336419 – Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing
334419 – Other Electronic Component Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332721 – Precision Turned Product Manufacturing
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
332919 – Other Metal Valve and Pipe Fitting Manufacturing
334412 – Bare Printed Circuit Board Manufacturing
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument 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
333515 – Cutting Tool and Machine Tool Accessory Manufacturing
339991 – Gasket, Packing, and Sealing Device 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
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
423610 – Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers
327110 – Pottery, Ceramics, and Plumbing Fixture Manufacturing
238210 – Electrical Contractors and Other Wiring Installation Contractors
332710 – Machine Shops
332510 – Hardware Manufacturing
335311 – Power, Distribution, and Specialty Transformer 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
332312 – Fabricated Structural Metal Manufacturing
321920 – Wood Container and Pallet Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
423510 – Metal Service Centers and Other Metal Merchant Wholesalers
339994 – Broom, Brush, and Mop 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
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
332710 – Machine Shops
333120 – Construction Machinery Manufacturing
336412 – Aircraft Engine and Engine Parts 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

Possible NAICS Codes
332710 – Machine Shops
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332510 – Hardware Manufacturing
333517 – Machine Tool Manufacturing
333515 – Cutting Tool and Machine Tool Accessory Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
333248 – All Other Industrial Machinery Manufacturing
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
333912 – Air and Gas Compressor Manufacturing
444140 – Hardware Retailers

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

Possible NAICS Codes
332710 – Machine Shops
333994 – Industrial Process Furnace and Oven Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
332811 – Metal Heat Treating
332813 – Electroplating, Plating, Polishing, Anodizing, and Coloring
332721 – Precision Turned Product Manufacturing
333517 – Machine Tool Manufacturing
332322 – Sheet Metal Work Manufacturing
334516 – Analytical Laboratory Instrument Manufacturing
333414 – Heating Equipment (except Warm Air Furnaces) 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
332510 – Hardware Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing

Includes
Bar Size Shapes (under 3 inches); Metal Piles and Piling; Angles; Channels; Tees; Zees.

Excludes
Plate, Sheet and Strip Materials (FSC 9515).

Notes
This class contains bulk material only. Specially designed items should be placed in a more appropriate class. This class includes items usually used in building, bridge and similar construction, such as, I beams, angles, and the like.

Possible NAICS Codes
332111 – Iron and Steel Forging
332312 – Fabricated Structural Metal Manufacturing
331221 – Rolled Steel Shape Manufacturing
332710 – Machine Shops
331110 – Iron and Steel Mills and Ferroalloy Manufacturing
332721 – Precision Turned Product Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
337215 – Showcase, Partition, Shelving, and Locker Manufacturing
488190 – Other Support Activities for Air Transportation

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

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
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
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
333517 – Machine Tool Manufacturing
332710 – Machine Shops
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
334516 – Analytical Laboratory Instrument Manufacturing
423830 – Industrial Machinery and Equipment Merchant Wholesalers
333120 – Construction Machinery Manufacturing