Plumbing, Heating, and Air-Conditioning Contractors, Sheet Metal Work Manufacturing, Power Boiler and Heat Exchanger Manufacturing, Metal Tank (Heavy Gauge) Manufacturing

Support Activities for Coal Mining, Support Activities for Metal Mining, Support Activities for Nonmetallic Minerals (except Fuels) Mining, Iron and Steel Mills, Electrometallurgical Ferroalloy Product Manufacturing

Industrial Building Construction, Commercial and Institutional Building Construction, Structural Steel and Precast Concrete Contractors, Fabricated Structural Metal Manufacturing, Fabricated Pipe and Pipe Fitting Manufacturing

Sheet Metal Work Manufacturing

Plate Work Manufacturing, Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers, Electroplating, Plating, Polishing, Anodizing, and Coloring, All Other Miscellaneous Fabricated Metal Product Manufacturing, Farm Machinery and Equipment Manufacturing

Iron Foundries, Steel Foundries (except Investment), Aluminum Foundries (except Die-Casting), Copper Foundries (except Die-Casting), Other Nonferrous Foundries (except Die-Casting)

Machine Shops, Precision Turned Product Manufacturing

Canvas and Related Product Mills, Wood Preservation, Wood Window and Door Manufacturing, All Other Miscellaneous Nonmetallic Mineral Product Manufacturing, Prefabricated Metal Building and Component Manufacturing

Metal Heat Treating

Sheet Metal Work Manufacturing

All Other Plastics Product Manufacturing, Machine Shops, Precision Turned Product Manufacturing, Bolt, Nut, Screw, Rivet, and Washer Manufacturing, Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers

Nonferrous (except Aluminum) Die-Casting Foundries, Hand and Edge Tool Manufacturing, Hardware Manufacturing, Other Fabricated Wire Product Manufacturing, Machine Shops

Metal Window and Door Manufacturing

Electroplating, Plating, Polishing, Anodizing, and Coloring, Railroad Rolling Stock Manufacturing, Line-Haul Railroads, Short Line Railroads, Deep Sea Freight Transportation

Ornamental and Architectural Metal Work Manufacturing

Fabricated Structural Metal Manufacturing

Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers, Fluid Power Valve and Hose Fitting Manufacturing, Aircraft Manufacturing, Other Aircraft Parts and Auxiliary Equipment Manufacturing, Transportation Equipment and Supplies (except Motor Vehicle) Merchant Wholesalers

Precision Turned Product Manufacturing

Hand and Edge Tool Manufacturing, Bolt, Nut, Screw, Rivet, and Washer Manufacturing, Power-Driven Handtool Manufacturing