NAICS Code 33631: Motor Vehicle Gasoline Engine and Engine Parts Manufacturing
NAICS industry
Definition
This industry comprises establishments primarily engaged in (1) manufacturing and/or rebuilding motor vehicle gasoline engines and engine parts and/or (2) manufacturing and/or rebuilding carburetors, pistons, piston rings, and engine valves, whether or not for vehicular use.
Government contracts for this product: PSC 2910 Engine Fuel System Components, Nonaircraft and PSC 2815 Diesel Engines and Components
Code facts
- Part of
-
-
31-33
-
336
- 3363
-
336
-
31-33
- Codes under it
- 1
- Contract awards
- 1,798 In the last 12 months
- Contract obligations
- $129,285,628 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 336310
- Assembly line rebuilding of automotive and truck gasoline engines
- Bearings (e.g., camshaft, crankshaft, connecting rod), automotive and truck gasoline engine, manufacturing
- Carburetors, all types, manufacturing
- Connecting rods, automotive and truck gasoline engine, manufacturing
- Crankshaft assemblies, automotive and truck gasoline engine, manufacturing
- Cylinder heads, automotive and truck gasoline engine, manufacturing
- Engine block assemblies, automotive and truck gasoline, manufacturing
- Engine intake and exhaust valves manufacturing
- Engines and parts (except diesel), automotive and truck, manufacturing
- Flywheels and ring gears, automotive and truck gasoline engine, manufacturing
- Fuel injection systems and parts, automotive and truck gasoline engine, manufacturing
- Fuel pumps, mechanical, automotive and truck gasoline engine, manufacturing
- Gasoline engine parts, mechanical, automotive and truck, manufacturing
- Gasoline engines, automotive and truck, manufacturing
- Governors for automotive gasoline engines manufacturing
- Internal combustion engines, automotive and truck gasoline, manufacturing
- Manifolds (i.e., intake and exhaust), automotive and truck gasoline engine, manufacturing
- Pistons and piston rings manufacturing
- Positive crankcase ventilation (PCV) valves, engine, manufacturing
- Pumps (e.g., fuel, oil, water), mechanical, automotive and truck gasoline engine (except power steering), manufacturing
- Rebuilding automotive and truck gasoline engines
- Rings, piston, manufacturing
- Rocker arms and parts, automotive and truck gasoline engine, manufacturing
- Timing gears and chains, automotive and truck gasoline engine, manufacturing
- Valves, engine, intake and exhaust, manufacturing
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $424,875 |
| FY2026 | $162,938,547 |
| FY2025 | $129,285,628 |
| FY2024 | $91,314,407 |
| FY2023 | $51,331,745 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Caterpillar Inc. | $41,583,656 | |
| 2 | BAE Systems Land & Armaments L.P. | $39,654,920 | |
| 3 | Tecmotiv (Usa), Inc. | $25,484,645 | |
| 4 | Leslie Controls, Inc. | $5,840,859 | |
| 5 | EOS Inc. | $5,125,502 | |
| 6 | Integrated Procurement Technologies | $3,823,826 | |
| 7 | LC Industries Inc. | $3,688,307 | |
| 8 | Marvin Land Systems, Inc. | $2,089,296 | |
| 9 | Mancon LLC | $1,963,116 | |
| 10 | Vacco Industries | $1,927,986 |
See the full FY2025 ranking of NAICS 33631 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Army | $117,492,564 | |
| 2 | Defense Logistics Agency | $34,699,991 | |
| 3 | Department of Homeland Security | $4,173,281 | |
| 4 | Department of the Navy | $3,760,799 | |
| 5 | Department of State | $2,939,005 | |
| 6 | Air Force | $268,899 | |
| 7 | Department of the Interior | $28,900 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 2910 Engine Fuel System Components, Nonaircraft | $84,745,323 | |
| 2 | 2815 Diesel Engines and Components | $43,736,819 | |
| 3 | 4820 Valves, Nonpowered | $16,981,586 | |
| 4 | 2590 Miscellaneous Vehicular Components | $6,053,830 | |
| 5 | 2310 Passenger Motor Vehicles | $2,618,867 | |
| 6 | 2920 Engine Electrical System Components, Nonaircraft | $2,512,005 | |
| 7 | 2930 Engine Cooling System Components, Nonaircraft | $1,810,691 | |
| 8 | 5331 O-Ring | $1,149,699 | |
| 9 | 4810 Valves, Powered | $635,039 | |
| 10 | 5340 Hardware | $395,817 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Pennsylvania | $41,540,699 | |
| 2 | New York | $28,205,706 | |
| 3 | Florida | $6,882,332 | |
| 4 | Michigan | $6,598,011 | |
| 5 | North Carolina | $5,851,610 | |
| 6 | California | $5,795,542 | |
| 7 | Ohio | $5,788,655 | |
| 8 | New Jersey | $2,125,244 | |
| 9 | Connecticut | $1,873,732 | |
| 10 | Indiana | $1,470,329 | |
| 11 | Louisiana | $1,161,052 | |
| 12 | Virginia | $1,047,422 | |
| 13 | Illinois | $1,028,991 | |
| 14 | Georgia | $934,775 | |
| 15 | Maryland | $863,870 | |
| 16 | South Carolina | $482,192 | |
| 17 | Massachusetts | $303,296 | |
| 18 | Kentucky | $281,726 | |
| 19 | Wisconsin | $263,905 | |
| 20 | Missouri | $200,498 | |
| 21 | New Hampshire | $153,768 | |
| 22 | Alabama | $146,305 | |
| 23 | Oklahoma | $125,383 | |
| 24 | Washington | $105,765 | |
| 25 | Maine | $69,460 | |
| 26 | Tennessee | $59,071 | |
| 27 | Iowa | $54,082 | |
| 28 | Arkansas | $52,632 | |
| 29 | Oregon | $37,870 | |
| 30 | Rhode Island | $29,926 | |
| 31 | Colorado | $26,293 | |
| 32 | West Virginia | $25,063 | |
| 33 | Arizona | $19,048 | |
| 34 | Nebraska | $18,984 | |
| 35 | Montana | $13,371 | |
| 36 | Idaho | $10,675 | |
| 37 | Utah | $9,363 | |
| 38 | New Mexico | $9,350 | |
| 39 | Minnesota | $8,649 | |
| 40 | Mississippi | $4,054 |
Show all 40
Shares are of everything obligated under NAICS 33631 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 12,448 listed here. See the rest on GovTribe.
Codes under 33631
| NAICS code | Size standard |
|---|---|
| 336310 Motor Vehicle Gasoline Engine and Engine Parts Manufacturing | 1,050 employees |
Quick answers
What is NAICS 33631?
NAICS 33631 is Motor Vehicle Gasoline Engine and Engine Parts Manufacturing, a NAICS industry in NAICS 31-33, Manufacturing.
What is the NAICS code for pistons and piston rings manufacturing?
The NAICS code for pistons and piston rings manufacturing is 336310, Motor Vehicle Gasoline Engine and Engine Parts Manufacturing. Its SBA small business size standard is 1,050 employees.
What is the NAICS code for engine intake and exhaust valves manufacturing?
The NAICS code for engine intake and exhaust valves manufacturing is 336310, Motor Vehicle Gasoline Engine and Engine Parts Manufacturing. Its SBA small business size standard is 1,050 employees.
What is the NAICS code for rebuilding automotive and truck gasoline engines?
The NAICS code for rebuilding automotive and truck gasoline engines is 336310, Motor Vehicle Gasoline Engine and Engine Parts Manufacturing. Its SBA small business size standard is 1,050 employees.
What codes are under NAICS 33631?
NAICS 33631 has one code under it with its own GovTribe page, 336310 Motor Vehicle Gasoline Engine and Engine Parts Manufacturing.
How much do federal agencies spend under NAICS 33631?
Federal contracts under NAICS 33631 obligated $129,285,628 in fiscal year 2025 and $435,295,202 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 33631?
The contractors with the most obligated under NAICS 33631 in fiscal years 2026 and 2027 are Caterpillar Inc. ($41,583,656); BAE Systems Land & Armaments L.P. ($39,654,920); and Tecmotiv (Usa), Inc. ($25,484,645).
Which agencies buy the most under NAICS 33631?
The agencies that obligated the most under NAICS 33631 in fiscal years 2026 and 2027 are Department of the Army ($117,492,564), Defense Logistics Agency ($34,699,991) and Department of Homeland Security ($4,173,281).
Which PSC codes are used with NAICS 33631?
The PSC codes with the most obligated under NAICS 33631 in fiscal years 2026 and 2027 are 2910 Engine Fuel System Components, Nonaircraft; 2815 Diesel Engines and Components; and 4820 Valves, Nonpowered.
Where is the work under NAICS 33631 performed?
By place of performance, the states with the most contract obligations under NAICS 33631 over the last 12 months are Pennsylvania ($41,540,699), New York ($28,205,706) and Florida ($6,882,332).
What is the latest contract opportunity under NAICS 33631?
The latest contract opportunity under NAICS 33631 is Flap valve non return, award notice from Land and Maritime (DLA), posted November 10, 2026.
On GovTribe
See everything under NAICS 33631
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