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    33399 - All Other General Purpose Machinery Manufacturing

    In the vast world of manufacturing, identifying the right industry classification is essential for businesses aiming to align with federal contracting opportunities, regulatory requirements, and industry analysis. NAICS Code 33399, titled All Other General Purpose Machinery Manufacturing, represents a critical niche within the manufacturing sector. This classification covers companies manufacturing a broad array of general-purpose machinery that doesn’t fit into other more specific categories, serving diverse industrial and commercial applications.

    What is NAICS Code 33399?

    NAICS Code 33399 encompasses establishments primarily engaged in manufacturing general-purpose machinery that is not classified elsewhere within the machinery manufacturing subsector. These machines are essential in supporting numerous industries, ranging from industrial production to specialized mechanical solutions.

    Key Features of NAICS 33399:

    • Focuses on general purpose machinery manufacturing.
    • Includes machinery used across different sectors and applications.
    • Covers niche or specialized machinery beyond commonly defined categories.

    Sector Overview: Manufacturing

    NAICS 33399 falls under the Manufacturing sector, a vital part of the U.S. economy responsible for producing machinery and equipment ranging from consumer goods to heavy industrial tools. Businesses under this code innovate and produce machinery used in various fields such as agriculture, construction, industrial processing, and customized machine tooling.

    Typical Business Activities Under NAICS 33399

    Establishments classified within this code are involved in a variety of manufacturing activities including, but not limited to:

    • Industrial Machinery Manufacturing: Producing machines used in industrial processes, fabricating, and assembly lines.
    • Specialized Machine Tool Manufacturing: Designing and building precision machinery tailored for cutting, shaping, and forming materials.
    • Custom Machinery Production: Creating bespoke machines crafted to specific client needs or unique industrial functions.

    These activities make NAICS 33399 critical for companies specializing in versatile machinery solutions that do not squarely fit within other specific industry descriptions.

    Size Standards for NAICS Code 33399

    For eligibility in federal programs and contracts, the Small Business Administration (SBA) defines size standards based on employee count or revenue for each NAICS code. The size standard for NAICS 33399 is:

    • Maximum number of employees: 500 employees

    Businesses meeting this criterion are considered small and may qualify for certain small business contracting opportunities and set-aside programs.

    Examples of Businesses Within NAICS 33399

    • Manufacturers of custom-built assembly line machinery.
    • Companies producing specialized agricultural machinery not classified under standard categories.
    • Firms creating unique packaging or material handling equipment.
    • Businesses manufacturing custom metal forming machines or presses.

    NAICS 33399 Code Details

    NAICS Code Title Sector Description Size Standard
    33399 All Other General Purpose Machinery Manufacturing Manufacturing Establishments primarily engaged in manufacturing general-purpose machinery not classified elsewhere. 500 employees

    Frequently Asked Questions (FAQs)

    What types of machinery are included in NAICS 33399?

    NAICS 33399 includes general-purpose machinery used across multiple industries that do not fall under specific machinery manufacturing codes, such as customized industrial machines, specialized machine tools, and other unique manufacturing equipment.

    How does NAICS 33399 differ from other machinery manufacturing codes?

    While other NAICS codes classify standard machinery types like agricultural, construction, or commercial machinery, 33399 serves as a category for all other general-purpose machines that don’t fit into those predefined categories.

    Why is NAICS 33399 important for government contractors?

    This code allows manufacturers producing specialized or niche machinery to be identified correctly, enabling eligibility for government contracts, small business programs, and regulatory compliance focused on manufacturing industries.

    What is the SBA size standard for NAICS 33399?

    The SBA defines the size standard as a maximum of 500 employees for small businesses under NAICS 33399. Meeting this standard can open doors to small business set-aside contracts.


    Understanding NAICS Code 33399 is essential for manufacturers specializing in broad and specialized machinery manufacturing not directly covered by other codes. Whether you are a business owner, government contractor, or industry analyst, recognizing the scope and opportunities within All Other General Purpose Machinery Manufacturing empowers you to better navigate the manufacturing landscape.

    Stay informed and maximize your potential by aligning your business with the accurate NAICS classification today!