| [331221] Rolled Steel Shape Manufacturing |
| [331315] Aluminum Sheet, Plate, and Foil Manufacturing |
| [331316] Aluminum Extruded Product Manufacturing |
| [332313] Plate Work Manufacturing |
| [332322] Sheet Metal Work Manufacturing |
| [332420] Metal Tank (Heavy Gauge) Manufacturing |
| [332510] Hardware Manufacturing |
| [332710] Machine Shops |
| [332721] Precision Turned Product Manufacturing |
| [332722] Bolt, Nut, Screw, Rivet, and Washer Manufacturing |
| [332811] Metal Heat Treating |
| [332812] Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers |
| [332813] Electroplating, Plating, Polishing, Anodizing, and Coloring |
| [332911] Industrial Valve Manufacturing |
| [332912] Fluid Power Valve and Hose Fitting Manufacturing |
| [332913] Plumbing Fixture Fitting and Trim Manufacturing |
| [332919] Other Metal Valve and Pipe Fitting Manufacturing |
| [332991] Ball and Roller Bearing Manufacturing |
| [332992] Small Arms Ammunition Manufacturing |
| [332993] Ammunition (except Small Arms) Manufacturing |
