| Naics index | Naics index description |
|---|---|
| 423510 | Nonferrous metals (except precious) merchant wholesalers |
| 423510 | Noninsulated wire merchant wholesalers |
| 423510 | Pig iron merchant wholesalers |
| 423510 | Pilings, metal, merchant wholesalers |
| 423510 | Pipe, metal, merchant wholesalers |
| 423510 | Poles, metal, merchant wholesalers |
| 423510 | Posts, metal, merchant wholesalers |
| 423510 | Rails and accessories, metal, merchant wholesalers |
| 423510 | Reinforcement mesh and wire merchant wholesalers |
| 423510 | Rods, metal (except precious), merchant wholesalers |