NAICS Code 336412 — Aircraft Engine and Engine Parts Manufacturing

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 6 national industries under 33641 (Aerospace Product and Parts Manufacturing).

Code	336412
Title	Aircraft Engine and Engine Parts Manufacturing
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	1,500 employees

Official definition (2022 NAICS)

This U.S. industry comprises establishments primarily engaged in one or more of the following: (1) manufacturing aircraft engines and engine parts; (2) developing and making prototypes of aircraft engines and engine parts; (3) aircraft propulsion system conversion (i.e., major modifications to systems); and (4) aircraft propulsion systems overhaul and rebuilding (i.e., periodic restoration of aircraft propulsion system to original design specifications).

Cross-References.

Is a business under 336412 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 336412 qualifies as a small business if it does not exceed 1,500 employees. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — employee count is averaged over the latest 24 months.

Where 336412 sits in the hierarchy

Level	Code	Title
Sector	31-33	Manufacturing
Subsector	336	Transportation Equipment Manufacturing
Industry Group	3364	Aerospace Product and Parts Manufacturing
NAICS Industry	33641	Aerospace Product and Parts Manufacturing
National Industry	336412	Aircraft Engine and Engine Parts Manufacturing

Related SIC codes

Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.

SIC code	Title
3724	Aircraft Engines and Engine Parts

Related National Industry codes

• 336411 — Aircraft Manufacturing
• 336413 — Other Aircraft Parts and Auxiliary Equipment Manufacturing
• 336414 — Guided Missile and Space Vehicle Manufacturing
• 336415 — Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing
• 336419 — Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.