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NAICS
NAICS Codes

Official North American industry classification system for business reporting and analysis.

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SIC Codes

Established U.S. industry classification system widely used across business, reporting, analytics, and cross-dataset comparability.

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Code Systems
Code Systems

Standard classification systems used to organize industries, products, occupations, and business identifiers across U.S. and global datasets

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What Is a NAICS 8-Digit Code?
All NAICS SIC Companies
SIC 6-Digit NAICS 8-Digit ISIC (International) NACE (Europe) SOC (Occupations) CIP (Programs) Extended SOC (O*NET)

NAICS 8-Digit Codes for "naics:331221"

Extended NAICS codes provide more specific industry categories within official 6-digit NAICS classifications, supporting more precise industry segmentation, market research, and business targeting. For official NAICS classification, use the 6-digit NAICS code.

Search this keyword in SIC 6-Digit codes.

companies

Verified U.S. companies available for purchase in this industry. Counts are based on primary business classifications.

Industry NAICS 8-Digit U.S. companies Add

Metals-Corrugated (Manufacturing)

Parent: Rolled Steel Shape Manufacturing

 Extended NAICS 331221-01 companies 15companies

Steel Straightening (Manufacturing)

Parent: Rolled Steel Shape Manufacturing

 Extended NAICS 331221-02 companies 2companies

Steel-Bar/Sheet/Strip/Tube & Etc (Manufacturing)

Parent: Rolled Steel Shape Manufacturing

 Extended NAICS 331221-03 companies 73companies

Pipe Corrugated Metal (Manufacturing)

Parent: Rolled Steel Shape Manufacturing

 Extended NAICS 331221-04 companies 3companies

Other classifications

Search "naics:331221" in SIC 6-Digit codes →

Sources & methodology

NAICS definitions: U.S. Census Bureau, 2022

SIC definitions: OSHA SIC Manual

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