NAICS 336510

Overview

The North American Industry Classification System (NAICS) is the government-wide standard for categorizing business establishments so federal statistical agencies can collect, analyze, and publish data about the U.S. economy. Created by the Economic Classification Policy Committee under OMB and adopted in 1997 to replace SIC, NAICS was jointly developed with Statistics Canada and Mexico’s INEGI. The current U.S. vintage is 2022. ¹

336510 — Railroad Rolling Stock Manufacturing covers establishments that manufacture and/or rebuild locomotives (including frames and parts); build railroad, street, and rapid transit cars and car equipment for freight and passenger service; and produce railway track-laying and maintenance equipment such as rail layers, ballast distributors, and rail tamping machinery. Federal programs and datasets use this code to group industry activity within Manufacturing (NAICS 31–33). ²

See also on G2X:

• G2X — NAICS 336510 overview
• G2X — NAICS 488210 Support Activities for Rail Transportation
• G2X — PSC 2210 Locomotives

What this NAICS covers

• Locomotive manufacturing and rebuilding, including locomotive frames and parts. ²
• Freight railcar manufacturing for operation on rails. ²
• Passenger railcar, streetcar, and rapid transit car manufacturing. ²
• Railcar equipment and car components designed for rail operations. ²
• Railway track-laying and maintenance equipment (e.g., rail layers, ballast distributors, tampers). ²
• Integrated rolling stock programs combining new build and rebuild/overhaul activities. ²

Related NAICS and PSC codes

Type	Code	Descriptor
NAICS	488210	Support Activities for Rail Transportation (repairs by rail/transit companies)
NAICS	333131	Mining Machinery and Equipment Manufacturing (includes mining rail cars)
PSC	2210	Locomotives
PSC	2220	Rail Cars

NAICS cross-references: ²
PSC descriptors: ³

Key exclusions

• Manufacturing mining rail cars is classified in NAICS 333131, not 336510. ²
• Locomotive fuel, lubricating, or cooling medium pumps fall under NAICS 333911. ²
• Repair establishments of railroad or local transit companies primarily repairing rail and transit cars are in NAICS 488210. ²

Frequently asked questions

• What products and activities fall under NAICS 336510?
  It includes manufacturing and/or rebuilding locomotives and parts; building freight and passenger railcars, streetcars, and rapid transit cars; and producing track-laying and maintenance equipment such as rail layers, ballast distributors, and tampers. These are all within the Manufacturing sector scope for rolling stock. ²

• Are railcar repairs included in NAICS 336510?
  Repairs performed by railroad or local transit company repair shops are classified in NAICS 488210. Establishments primarily engaged in manufacturing or rebuilding rolling stock remain in 336510, even when rebuild/overhaul is a significant portion of activity. ²

• Does NAICS 336510 cover railway maintenance-of-way equipment?
  Yes. It includes production of track-laying and maintenance equipment such as rail layers, ballast distributors, and tamping equipment used for railway infrastructure construction and upkeep. These machines are part of the rolling stock and maintenance equipment portfolio recognized under this code. ²

• What is NAICS and which version is current for U.S. use?
  NAICS is the federal standard for classifying business establishments, created under OMB and jointly maintained with Canada and Mexico. The current U.S. version is 2022, reflected in the Census NAICS search and documentation. ¹

• Are mining rail cars classified in NAICS 336510?
  No. Manufacturing mining rail cars falls under NAICS 333131 for Mining Machinery and Equipment Manufacturing, not under Railroad Rolling Stock Manufacturing. This is a specific cross-reference exclusion noted by the Census Bureau. ²

Useful resources

• G2X — NAICS 336510 overview
• U.S. Census Bureau — NAICS main page and 2022 NAICS search. ¹
• U.S. Census Bureau — NAICS 336510 industry definition and cross-references. ²
• U.S. Census Bureau — 2022 Economic Census, Manufacturing (NAICS 31–33) data tables. ⁴
• GSA — Product and Service Code (PSC) Manual (for PSC categories such as 2210 and 2220). ³

References

1. U.S. Census Bureau, North American Industry Classification System (NAICS) main page. https://www.census.gov/naics/
2. U.S. Census Bureau, NAICS 2022 — 336510 Railroad Rolling Stock Manufacturing (search/detail page). https://www.census.gov/naics/?input=336510&year=2022&details=336510
3. U.S. General Services Administration, Product and Service Code (PSC) Manual. https://www.acquisition.gov/psc-manual
4. U.S. Census Bureau, 2022 Economic Census — Manufacturing (NAICS 31–33) data tables. https://www.census.gov/data/tables/2022/econ/economic-census/naics-sector-31-33.html