| [331511] Iron Foundries |
| [331512] Steel Investment Foundries |
| [331513] Steel Foundries (except Investment) |
| [332116] Metal Stamping |
| [332312] Fabricated Structural Metal Manufacturing |
| [332510] Hardware Manufacturing |
| [332618] Other Fabricated Wire Product Manufacturing |
| [332710] Machine Shops |
| [332721] Precision Turned Product Manufacturing |
| [332911] Industrial Valve Manufacturing |
| [332996] Fabricated Pipe and Pipe Fitting Manufacturing |
| [332997] Industrial Pattern Manufacturing |
| [333512] Machine Tool (Metal Cutting Types) Manufacturing |
| [333513] Machine Tool (Metal Forming Types) Manufacturing |
| [333514] Special Die and Tool, Die Set, Jig, and Fixture Manufacturing |
| [333515] Cutting Tool and Machine Tool Accessory Manufacturing |
| [333516] Rolling Mill Machinery and Equipment Manufacturing |
| [333518] Other Metalworking Machinery Manufacturing |
