| Naics index | Naics index description |
|---|---|
| 331110 | Spiegeleisen ferroalloys manufacturing |
| 331110 | Spike rods made in iron and steel mills |
| 331110 | Sponge iron |
| 331110 | Stainless steel made in iron and steel mills |
| 331110 | Steel balls made in iron and steel mills |
| 331110 | Steel manufacturing |
| 331110 | Steel mill products (e.g., bar, plate, rod, sheet, structural shapes) manufacturing |
| 331110 | Steel mills |
| 331110 | Steel, from pig iron, manufacturing |
| 331110 | Strip, galvanized iron or steel, made in iron and steel mills |