Includes
Prefabricated Concrete Placing Forms; Builders' Ladders and Stepladders; Suspension stages.

Excludes
Aircraft Ladders (FSC 1730); Fire Fighting Ladders (FSC 4210); Maintenance Ladders (FSC 4940); Marine Vessel Ladders (FSC 2090); Vehicle Ladders (FSC 2540).

Possible NAICS Codes
532490 – Other Commercial and Industrial Machinery and Equipment Rental and Leasing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
327331 – Concrete Block and Brick Manufacturing
332311 – Prefabricated Metal Building and Component Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
336611 – Ship Building and Repairing
327390 – Other Concrete Product Manufacturing
322211 – Corrugated and Solid Fiber Box Manufacturing
332510 – Hardware Manufacturing
332323 – Ornamental and Architectural Metal Work Manufacturing

Description
Tile, Brick, and Block

Includes
Concrete Building Block; Cinder Block; Slag Brick; Cut Stone; Cut and Polished Stone; Ceramic Floor and Wall Tile; Architectural Terra Cotta; Concrete Slabs and Grilles.

Excludes
Glass Building Block (FSC 9340)

Possible NAICS Codes
327331 – Concrete Block and Brick Manufacturing
238990 – All Other Specialty Trade Contractors
238340 – Tile and Terrazzo Contractors
327390 – Other Concrete Product Manufacturing
314110 – Carpet and Rug Mills
238330 – Flooring Contractors
423320 – Brick, Stone, and Related Construction Material Merchant Wholesalers
238110 – Poured Concrete Foundation and Structure Contractors
238140 – Masonry Contractors
811490 – Other Personal and Household Goods Repair and Maintenance

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

Includes
Brickmaking Machinery.

Possible NAICS Codes
327390 – Other Concrete Product Manufacturing
327320 – Ready-Mix Concrete Manufacturing
238110 – Poured Concrete Foundation and Structure Contractors
212319 – Other Crushed and Broken Stone Mining and Quarrying
327331 – Concrete Block and Brick Manufacturing
212312 – Crushed and Broken Limestone Mining and Quarrying
212321 – Construction Sand and Gravel Mining
327120 – Clay Building Material and Refractories Manufacturing
444180 – Other Building Material Dealers
444140 – Hardware Retailers

Notes
This class includes, and is restricted to, devices the operation of which is based on principles involving the stimulated emission of radiation, and to associated components and accessories directly related to stimulated coherent radiation techniques. The methods for producing the radiation are those obtained by LASER (Light Amplification by Stimulated Emission of Radiation) and by MASER (Microwave and/or Molecular Amplification by Stimulated Emission of Radiation) techniques. Only those items specifically designed for stimulated coherent radiation applications, and having no other application, are to be included in this class. Assemblies or major systems containing such devices are excluded from this class.

Possible NAICS Codes
334519 – Other Measuring and Controlling Device Manufacturing
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
334516 – Analytical Laboratory Instrument Manufacturing
332721 – Precision Turned Product Manufacturing
334517 – Irradiation Apparatus Manufacturing
335999 – All Other Miscellaneous Electrical Equipment and Component Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
334220 – Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing
333517 – Machine Tool Manufacturing

Possible NAICS Codes
561210 – Facilities Support Services
236220 – Commercial and Institutional Building Construction
238220 – Plumbing, Heating, and Air-Conditioning Contractors
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
238290 – Other Building Equipment Contractors
236210 – Industrial Building Construction
238320 – Painting and Wall Covering Contractors
238210 – Electrical Contractors and Other Wiring Installation Contractors
561720 – Janitorial Services

Excludes
Load Chain; Chain and Metal Rope Fittings; Wire Rope; Hoists; Ship Rigging.

Possible NAICS Codes
333923 – Overhead Traveling Crane, Hoist, and Monorail System Manufacturing
339999 – All Other Miscellaneous Manufacturing
332618 – Other Fabricated Wire Product Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
314994 – Rope, Cordage, Twine, Tire Cord, and Tire Fabric Mills
488190 – Other Support Activities for Air Transportation
336211 – Motor Vehicle Body Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing

Includes
Door Frames; Window Frames; Window Sashes; Eave Troughs (gutters); Gratings; Grilles, Shutters; Fixed Fire Escapes; Mounted Partitions.

Excludes
Plumbing and Associated Components such as Sinks; Wallboard and Items Classified as Furniture.

Notes
Items specified as Wooden are classified in FSC 5520.

Possible NAICS Codes
326122 – Plastics Pipe and Pipe Fitting Manufacturing
444180 – Other Building Material Dealers
332321 – Metal Window and Door Manufacturing
332311 – Prefabricated Metal Building and Component Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
321992 – Prefabricated Wood Building Manufacturing
238290 – Other Building Equipment Contractors
236220 – Commercial and Institutional Building Construction
332312 – Fabricated Structural Metal Manufacturing

Possible NAICS Codes
236220 – Commercial and Institutional Building Construction
236210 – Industrial Building Construction
238990 – All Other Specialty Trade Contractors
238160 – Roofing Contractors
237990 – Other Heavy and Civil Engineering Construction
238210 – Electrical Contractors and Other Wiring Installation Contractors

Includes
Mockups; Cutaway Models; Scale Models; Training Films; Training Aid Maps; Navigational Training Aids; Flight Instrument Training Aids; Aircraft Instrument Training Aids; Vehicle Training Aids; Engine Instrument Training Aids; Hydraulic System Training Aids; Cutaway, Mockup, or Sectionalized Ammunition only; Training Equipment normally used in classroom training.

Excludes
Drill, Dummy, Exercise, Practice, or Simulated Ammunition and Weapons.

Possible NAICS Codes
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
611430 – Professional and Management Development Training
561990 – All Other Support Services
541330 – Engineering Services
339113 – Surgical Appliance and Supplies Manufacturing
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
339999 – All Other Miscellaneous Manufacturing
541519 – Other Computer Related Services
493110 – General Warehousing and Storage

Includes
Asphalt; Cinders; Gravel; Lime; Sand; Rough Dimension Stone, including Rubble; Cement; Ballast.

Excludes
Block, Shaped; Brick.

Possible NAICS Codes
212321 – Construction Sand and Gravel Mining
327320 – Ready-Mix Concrete Manufacturing
212312 – Crushed and Broken Limestone Mining and Quarrying
212319 – Other Crushed and Broken Stone Mining and Quarrying
327992 – Ground or Treated Mineral and Earth Manufacturing
324121 – Asphalt Paving Mixture and Block Manufacturing
327999 – All Other Miscellaneous Nonmetallic Mineral Product Manufacturing
423320 – Brick, Stone, and Related Construction Material Merchant Wholesalers
327991 – Cut Stone and Stone Product Manufacturing
444140 – Hardware Retailers

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

Possible NAICS Codes
238320 – Painting and Wall Covering Contractors
561210 – Facilities Support Services
236118 – Residential Remodelers
238990 – All Other Specialty Trade Contractors
238330 – Flooring Contractors
236220 – Commercial and Institutional Building Construction
238220 – Plumbing, Heating, and Air-Conditioning Contractors
238390 – Other Building Finishing Contractors
238140 – Masonry Contractors
561720 – Janitorial Services

Includes
Cork Fabricated Basic Materials; Asbestos Fabricated Materials; Manufactured Mica; Minerals for scientific and technical use (cut but not mounted); Pottery Supplies; Catgut and Wormgut; Vegetable Brush Fibers; Bagasse.

Possible NAICS Codes
327999 – All Other Miscellaneous Nonmetallic Mineral Product Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
339950 – Sign Manufacturing
332510 – Hardware Manufacturing
325991 – Custom Compounding of Purchased Resins
337214 – Office Furniture (except Wood) Manufacturing
326199 – All Other Plastics Product Manufacturing
333618 – Other Engine Equipment Manufacturing
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing

Possible NAICS Codes
238990 – All Other Specialty Trade Contractors
332618 – Other Fabricated Wire Product Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
332323 – Ornamental and Architectural Metal Work Manufacturing
561621 – Security Systems Services (except Locksmiths)
331222 – Steel Wire Drawing
236220 – Commercial and Institutional Building Construction
321999 – All Other Miscellaneous Wood Product Manufacturing
332312 – Fabricated Structural Metal Manufacturing
423390 – Other Construction Material Merchant Wholesalers