| [331111] Iron and Steel Mills |
| [331112] Electrometallurgical Ferroalloy Product Manufacturing |
| [331210] Iron and Steel Pipe and Tube Manufacturing from Purchased Steel |
| [331221] Rolled Steel Shape Manufacturing |
| [331222] Steel Wire Drawing |
| [331311] Alumina Refining |
| [331312] Primary Aluminum Production |
| [332710] Machine Shops |
| [332721] Precision Turned Product Manufacturing |
| [332722] Bolt, Nut, Screw, Rivet, and Washer Manufacturing |
| [332919] Other Metal Valve and Pipe Fitting Manufacturing |
| [332995] Other Ordnance and Accessories Manufacturing |
| [332996] Fabricated Pipe and Pipe Fitting Manufacturing |
| [332999] All Other Miscellaneous Fabricated Metal Product Manufacturing |
