333611

Turbine and Turbine Generator Set Units Manufacturing

Manufacturing › Machinery Manufacturing › Engine, Turbine, and Power Transmission Equipment Manufacturing

SBA Size Standard

1,500 employees

Employee-Based Verify at SBA.gov →

NAICS Code Hierarchy

33

Sector

Manufacturing

333

Subsector

Machinery Manufacturing

3336

Industry Group

Engine, Turbine, and Power Transmission Equipment Manufacturing

333611

National Industry (This Code)

Turbine and Turbine Generator Set Units Manufacturing

Official NAICS Description

Source: U.S. Census Bureau 2022 NAICS

📘 Source: U.S. Census Bureau — 2022 NAICS Manual
This U.S. industry comprises establishments primarily engaged in manufacturing turbines (except aircraft); and complete turbine generator set units, such as steam, hydraulic, gas, and wind.

✓ Small Business Eligibility at a Glance

Based on SBA Table of Small Business Size Standards (2024)

Size Standard

1,500 employees

Measurement Period

Current count

Standard Type

Employee-Based

Applies To

All contracts under NAICS 333611

Set-Aside Programs

8(a), WOSB, HUBZone, SDVOSB

Certification Required

No (self-certify in SAM.gov)

Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.

Cross-References

The following activities are classified elsewhere in the NAICS system:

Manufacturing aircraft turbines--are classified in U.S. Industry 336412, Aircraft Engine and Engine Parts Manufacturing; and
Manufacturing generators or prime mover generator sets (except turbines)--are classified in U.S. Industry 335312, Motor and Generator Manufacturing.

How to Use NAICS 333611 in SAM.gov

NAICS code 333611Turbine and Turbine Generator Set Units Manufacturing — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Engine, Turbine, and Power Transmission Equipment Manufacturing space will be able to find your business.

If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of 1,500 employees, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 333611.

Log in Entity Registration Goods & Services Add NAICS Code Enter 333611 Save

Frequently Asked Questions

What is NAICS code 333611?

NAICS code 333611 is 'Turbine and Turbine Generator Set Units Manufacturing', classified under the Manufacturing sector (NAICS 33). This U.S. industry comprises establishments primarily engaged in manufacturing turbines (except aircraft); and complete turbine generator set units, such as steam, hydraulic, gas, and wind. Cross-Ref

What is the SBA small business size standard for NAICS code 333611?

The SBA defines a small business under NAICS code 333611 (Turbine and Turbine Generator Set Units Manufacturing) as one with 1,500 employees. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.

How do I register NAICS code 333611 in SAM.gov?

To register NAICS code 333611 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 333611 (Turbine and Turbine Generator Set Units Manufacturing) to your NAICS code list. You may designate one code as your Primary NAICS code.

Quick Actions

Related NAICS Codes

Other codes in Engine, Turbine, and Power Transmission Equipment Manufacturing

Related PSC Codes

PSC codes commonly used with this NAICS sector

Source: GSA PSC Manual April 2025

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