NAICS 333618 size standard: Other Engine Equipment Manufacturing
Sectors 31-33—Manufacturing › Subsector 333—Machinery Manufacturing
1,500 employees
average number of employees
A business whose primary industry is NAICS 333618 (Other Engine Equipment Manufacturing) is small for SBA and federal contracting purposes if it has no more than 1,500 employees on average, including affiliates.
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NAICS 333618 on AwardWatchdog
Footnotes that apply
Footnote 6. NAICS Subsectors 333, 334, 335 and 336—For rebuilding machinery or equipment on a factory basis, or equivalent, use the NAICS code for a newly manufactured product. Concerns performing major rebuilding or overhaul activities do not necessarily have to meet the criteria for being a “manufacturer” although the activities may be classified under a manufacturing NAICS code. Ordinary repair services or preservation are not considered rebuilding.
Before you rely on this
- Affiliates count. SBA adds the receipts or employees of your affiliates (companies that control you, that you control, or that share common ownership or management) to yours. See 13 CFR 121.103.
- Receipts are a 5-year average. Average annual receipts are generally your total receipts over your last 5 completed fiscal years divided by 5 (13 CFR 121.104).
- Employees are a 24-month average. Employee-based standards use your average number of employees per pay period over the preceding 24 completed calendar months, counting part-time and temporary staff (13 CFR 121.106).
- The contract decides the code. For a federal contract, the contracting officer assigns one NAICS code in the solicitation, and that code’s size standard is the one that counts.
- Check officially. Use the official SBA Size Standards Tool and keep your SAM.gov registration current.
Not legal or professional advice. This is a free estimate from AwardWatchdog based on SBA’s published table. AwardWatchdog is not affiliated with SBA or the U.S. government. Only SBA can make a formal size determination.
Common questions
What is the SBA size standard for NAICS 333618?
A business whose primary industry is NAICS 333618 (Other Engine Equipment Manufacturing) is small for SBA and federal contracting purposes if it has no more than 1,500 employees on average, including affiliates. The standard comes from SBA’s table at 13 CFR 121.201 (last amended effective March 17, 2023).
How are employees counted for NAICS 333618?
SBA averages the number of employees for each pay period over the preceding 24 completed calendar months, counting full-time, part-time and temporary employees, and includes affiliates (13 CFR 121.106).
Is this an official size determination?
No. This page is an estimate from AwardWatchdog based on SBA’s published table. Use the official SBA Size Standards Tool at sba.gov and only SBA can make a formal size determination.
Related codes in Machinery Manufacturing
333111 Farm Machinery and Equipment Manufacturing (1,250 employees) · 333112 Lawn and Garden Tractor and Home Lawn and Garden Equipment Manufacturing (1,500 employees) · 333120 Construction Machinery Manufacturing (1,250 employees) · 333131 Mining Machinery and Equipment Manufacturing (900 employees) · 333132 Oil and Gas Field Machinery and Equipment Manufacturing (1,250 employees) · 333241 Food Product Machinery Manufacturing (500 employees) · 333242 Semiconductor Machinery Manufacturing (1,500 employees) · 333243 Sawmill, Woodworking, and Paper Machinery Manufacturing (550 employees) · 333248 All Other Industrial Machinery Manufacturing (750 employees) · 333310 Commercial and Service Industry Machinery Manufacturing (1,000 employees) · 333413 Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (500 employees) · 333414 Heating Equipment (except Warm Air Furnaces) Manufacturing (500 employees)
Source: 13 CFR 121.201 (SBA table of small business size standards, eCFR current as of October 15, 2026; last amended effective March 17, 2023). See also SBA’s table of size standards.
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