| Naics index | Naics index description |
|---|---|
| 331511 | Malleable iron foundries |
| 331511 | Manhole covers, cast iron, manufacturing |
| 331511 | Molds for casting steel ingots manufacturing |
| 331511 | Molds, steel ingot, industrial, manufacturing |
| 331511 | Pearlitic castings, malleable iron, unfinished, manufacturing |
| 331511 | Pipe and pipe fittings, cast iron, manufacturing |
| 331511 | Pipe couplings, cast iron, manufacturing |
| 331511 | Rolling mill rolls, iron, manufacturing |
| 331511 | Semisteel foundries |
| 331511 | Sewer pipe, cast iron, manufacturing |