NAICS 336412

Overview

The North American Industry Classification System (NAICS) is the governmentwide standard for classifying establishments to produce consistent U.S. economic statistics. Developed under the Office of Management and Budget in cooperation with Canada and Mexico, NAICS replaced SIC in 1997 and is updated on a five-year cycle; current Economic Census statistics use the 2022 NAICS vintage. ¹

NAICS 336412 covers establishments primarily engaged in manufacturing aircraft engines and engine parts; developing and producing prototypes of aircraft engines and engine parts; performing major propulsion system conversions; and overhauling or rebuilding aircraft propulsion systems to original design specifications. Routine engine repair outside overhauls, rebuilds, or conversions is classified elsewhere. The industry includes production of discrete engine components for separate sale when performed by engine and engine-parts manufacturers, and it encompasses establishments where engine overhauls or rebuilds are the predominant output. ²

See also on G2X:

• G2X — NAICS 336411
• G2X — NAICS 336413

What this NAICS covers

• Manufacturing complete aircraft engines and engine parts for aircraft propulsion. ²
• Developing and producing prototypes of aircraft engines and engine parts. ²
• Performing aircraft propulsion system conversions (major modifications). ²
• Overhauling and rebuilding aircraft propulsion systems to original design specifications. ²
• Producing discrete aircraft engine components for separate sale. ²
• Establishment-level activities where engine overhauls/rebuilds are the predominant output. ²

Related NAICS and PSC codes

Key boundary notes (official cross-references)

• Guided missile and space vehicle propulsion units and parts are classified under NAICS 336415, not NAICS 336412. ²
• Aircraft intake/exhaust valves and pistons are classified under NAICS 336311. ²
• Aircraft internal combustion engine filters are classified under NAICS 336312. ²
• Repair of aircraft engines other than overhauling, conversion, and rebuilding falls under NAICS 488190. ²

Frequently asked questions

• How is NAICS 336412 different from NAICS 336413?
  336412 focuses on aircraft engines and engine parts, including prototypes, conversions, and overhauls. 336413 covers other aircraft parts and auxiliary equipment, excluding engines and fluid power subassemblies. ²

• Does NAICS 336412 include engine repair services?
  It includes overhauls, rebuilds, and conversions restoring propulsion systems to original design specifications. Routine repair outside those activities is classified in NAICS 488190. ²

• Are prototypes counted under NAICS 336412?
  Yes. Development and production of prototypes for aircraft engines and engine parts are explicitly included within the industry scope. ²

• Which PSC best fits procurement of aircraft turbine engines and major components?
  PSC 2840 covers “Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components,” including compressor/turbine rotors, blades, combustion chambers, and afterburners. Select the PSC that best matches the predominant item. ³

• Is there an official NAICS-to-PSC mapping for NAICS 336412?
  Not specified by official sources. ¹

Useful resources

• U.S. Census Bureau: NAICS entry for NAICS 336412 (official description and cross-references). ²
• U.S. Census Bureau: NAICS Codes & Understanding Industry Classification Systems (2022 Economic Census guidance). ¹
• GSA Acquisition.gov: Product and Service Code (PSC) Manual, April 2025 (PDF, definitions for PSCs such as 2840). ³

References

1. U.S. Census Bureau — Economic Census: NAICS Codes & Understanding Industry Classification Systems (2022 guidance). https://www.census.gov/programs-surveys/economic-census/year/2022/technical-documentation/code-lists/understanding-naics-redirect.html
2. U.S. Census Bureau — NAICS Sector 31–33 content including official description for NAICS 336412 and cross-references. https://www.census.gov/naics/resources/archives/sect31-33.html
3. U.S. General Services Administration — Product and Service Code Manual, April 2025 (PDF). https://www.acquisition.gov/sites/default/files/manual/PSC%20Manual%20April%202025.pdf