# NAICS 331511: Iron Foundries

The SBA size standard for NAICS 331511 is 1,000 employees (13 CFR 121.201).

| Field | Value |
| --- | --- |
| Code | 331511 |
| Title | Iron Foundries |
| Level | 6 |
| Parent | 33151 |
| Size standard | 1,000 employees |
| Footnote | - |

## Description

This U.S. industry comprises establishments primarily engaged in pouring molten pig iron or iron alloys into molds to manufacture castings (e.g., cast iron manhole covers, cast iron pipe, cast iron skillets). Establishments in this industry purchase iron made in other establishments.

## Sources

- Census NAICS: https://www.census.gov/naics/
- SBA size standards: https://www.sba.gov/document/support-table-size-standards

## API and MCP

- REST: GET https://samgovapi.io/api/v1/naics/331511/size-standard?revenue_usd=...
- MCP tools: naics_lookup, size_standard_check

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