333618 — Other Engine Equipment Manufacturing
Description
This U.S. industry comprises establishments primarily engaged in manufacturing internal combustion engines (except automotive gasoline and aircraft).
Exclusions & Cross-References
- Manufacturing gasoline motor vehicle engines and motor vehicle transmissions--are classified in Industry
- Group 3363, Motor Vehicle Parts Manufacturing;
- Manufacturing gasoline aircraft engines and aircraft transmissions--are classified in Industry 33641,
- Aerospace Product and Parts Manufacturing;
- Manufacturing turbine and turbine generator set units--are classified in U.S. Industry 333611, Turbine and
- Turbine Generator Set Units Manufacturing;
- Manufacturing speed changers and industrial high-speed drives and gears--are classified in U.S. Industry
- 333612, Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing; and
- Manufacturing mechanical power transmission equipment (except motor vehicle and aircraft)--are
- classified in U.S. Industry 333613, Mechanical Power Transmission Equipment Manufacturing.
Overview Facts
| NAICS Code | 333618 |
|---|---|
| Industry Title | Other Engine Equipment Manufacturing |
| SBA Size Standard | 1,500 employees |
| U.S. Establishments | 263 (Census CBP, 2023) |
| IRS PBA Code | 333610 (rolled-up match) |
| Sectors Hierarchy | Sector 31-33 → 333 → 3336 |
| Source / Verified | US Census 2022 NAICS Manual, Census CBP / 2026-06-28 |
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3519 - Internal Combustion Engines, NEC (via SIC1987:3519→NAICS1997:333618→2002:333618→2007:333618→2012:333618→2017:333618→2022:333618)
- SIC 3699 - Electrical Machinery Equipment, and Supplies, NEC (via SIC1987:3699→NAICS1997:333618→2002:333618→2007:333618→2012:333618→2017:333618→2022:333618)
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 2805 — Gasoline Reciprocating Engines, Except Aircraft; and Components
- PSC 2810 — Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components
- PSC 2815 — Diesel Engines and Components
- PSC 2835 — Gas Turbines and Jet Engines, Non-Aircraft; and Components
- PSC 2845 — Rocket Engines and Components
- PSC 2895 — Miscellaneous Engines and Components
- PSC 2930 — Engine Cooling System Components, Nonaircraft
- PSC 2940 — Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft
- PSC 2990 — Miscellaneous Engine Accessories, Nonaircraft
- PSC 6105 — Motors, Electrical
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 333618:
- 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.
- 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.
Related Industries in 3336
Frequently Asked Questions (FAQ)
Is 333618 a valid 2022 NAICS code?
NAICS 333618 is 'Other Engine Equipment Manufacturing', a 2022 U.S. national industry under Sector 31-33 (Manufacturing); the SBA small-business size standard is 1,500 employees.
What is the SBA size standard for NAICS 333618?
The SBA small business size standard for NAICS 333618 is 1,500 employees (based on employees).
What is the legacy SIC code mapping for 333618?
NAICS code 333618 maps to the legacy 1987 SIC codes: 3519 - Internal Combustion Engines, NEC, 3699 - Electrical Machinery Equipment, and Supplies, NEC.