327310 — Cement Manufacturing
Description
This industry comprises establishments primarily engaged in manufacturing Portland, natural, masonry, pozzolanic, and other hydraulic cements. Cement manufacturing establishments may calcine earths or mine, quarry, manufacture, or purchase lime (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- Mining or quarrying limestone--are classified in U.S. Industry 212312, Crushed and Broken Limestone
- Mining and Quarrying;
- Manufacturing lime--are classified in Industry 327410, Lime Manufacturing;
- Manufacturing ready-mix concrete--are classified in Industry 327320, Ready-Mix Concrete Manufacturing;
- and
- Manufacturing dry mix concrete--are classified in U.S. Industry 327999, All Other Miscellaneous
- Nonmetallic Mineral Product Manufacturing.
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3241 - Cement, Hydraulic (via SIC1987:3241→NAICS1997:32731→2002:327310→2007:327310→2012:327310→2017:327310→2022:327310)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC 3630 — Clay and Concrete Products Industries Machinery
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 327310 valid in 2022? ▾
Yes, 327310 is a valid 6-digit 2022 NAICS national industry code representing 'Cement Manufacturing' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 327310? ▾
The Small Business Administration (SBA) has established a small business size standard of 1,000 employees for NAICS code 327310 (Cement Manufacturing), calculated based on employees.
What is the legacy SIC equivalent for NAICS 327310? ▾
According to official Census Bureau concordance tables, NAICS code 327310 (Cement Manufacturing) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 3241 - Cement, Hydraulic.
Related Pages & Tools
Further regulatory reference links for NAICS code 327310:
- Sector 31-33 Directory Hub — List of related industries in the Manufacturing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 327310 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Cement Manufacturing).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.