| [331111] Iron and Steel Mills |
| [332112] Nonferrous Forging |
| [332114] Custom Roll Forming |
| [332115] Crown and Closure Manufacturing |
| [332116] Metal Stamping |
| [332117] Powder Metallurgy Part Manufacturing |
| [332211] Cutlery and Flatware (except Precious) Manufacturing |
| [332212] Hand and Edge Tool Manufacturing |
| [332213] Saw Blade and Handsaw Manufacturing |
| [332214] Kitchen Utensil, Pot, and Pan Manufacturing |
| [332311] Prefabricated Metal Building and Component Manufacturing |
| [332312] Fabricated Structural Metal Manufacturing |
| [332313] Plate Work Manufacturing |
| [332321] Metal Window and Door Manufacturing |
| [332322] Sheet Metal Work Manufacturing |
| [332323] Ornamental and Architectural Metal Work Manufacturing |
| [332410] Power Boiler and Heat Exchanger Manufacturing |
| [332420] Metal Tank (Heavy Gauge) Manufacturing |
| [332431] Metal Can Manufacturing |
