What is NAICS 333618?

NAICS 333618 is a 6-digit North American Industry Classification System code that federal contracting officers use to classify solicitations and confirm bidder eligibility. The Census Bureau maintains the NAICS taxonomy.

How do I bid on federal contracts as a small business in NAICS 333618?

Register your business in SAM.gov, get a UEI, and confirm your NAICS code matches the solicitation's primary NAICS. Then write a capability statement that maps your past performance to the work in the RFP. Themis automates the matching and gives you a free AI brief for every active opportunity.

Do I need a SAM.gov registration to bid?

Yes — every federal contract award above the micro-purchase threshold requires the vendor to have an active SAM.gov registration with a Unique Entity Identifier (UEI) and the relevant NAICS codes listed on the registration.

What set-asides apply to NAICS 333618?

Common federal set-asides — Small Business (SBA), 8(a), HUBZone, SDVOSB, WOSB, EDWOSB — apply per solicitation, not per NAICS code. Each opportunity declares its own set-aside; Themis displays the eligibility class on every card so you can filter to ones you qualify for.

Federal contracts · NAICS 333618

Federal contracts for NAICS 333618

Live federal + LA municipal opportunities under NAICS 333618, plus the contracting officers, top primes, and agencies that actually buy this work.

Browse opportunities →Read your free AI brief →

6 active solicitations·4 federal agencies·Last refreshed Jun 30, 2026

Active opportunities in NAICS 333618

Refreshed continuously from SAM.gov and partner agencies. Showing the 5 most-urgent active solicitations.

Navsup Weapon Systems Support MechSupply

LUBE OIL COOLER

View full solicitation at SAM.gov.

Est. value

Not posted

Closes

Jul 6, 2026

Top primes in NAICS 333618

Federal primes ranked by total obligated dollars under NAICS 333618 over the last 5 fiscal years. Source: USAspending.gov.

#1
CUMMINS INC.28 contracts · Department of Defense
$487.3M
#2
FAIRBANKS MORSE, LLC17 contracts · Department of Defense
$140.2M
#3
ROLLS-ROYCE SOLUTIONS AMERICA INC3 contracts · Department of Homeland Security
$136.0M
#4
OSHKOSH DEFENSE LLC2 contracts · Department of Defense
$110.9M

Agencies buying NAICS 333618

The top federal customers historically active in NAICS 333618by obligated dollars. Match your past performance to the agency that’s most likely to write your next contract.

#1
Department of Defense98 contracts
$1.5B
#2
Department of Homeland Security2 contracts
$16.2M

Free capability statement builder for NAICS 333618 contractors

One-page PDF in proposal-grade prose. UEI, NAICS, certifications, past performance, and differentiators — the document contracting officers actually skim during sources-sought market research. No account required.

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Frequently asked questions

What is NAICS 333618?: NAICS 333618 is a 6-digit North American Industry Classification System code that federal contracting officers use to classify solicitations and confirm bidder eligibility. The Census Bureau maintains the NAICS taxonomy.
How do I bid on federal contracts as a small business in NAICS 333618?: Register your business in SAM.gov, get a UEI, and confirm your NAICS code matches the solicitation's primary NAICS. Then write a capability statement that maps your past performance to the work in the RFP. Themis automates the matching and gives you a free AI brief for every active opportunity.
Do I need a SAM.gov registration to bid?: Yes — every federal contract award above the micro-purchase threshold requires the vendor to have an active SAM.gov registration with a Unique Entity Identifier (UEI) and the relevant NAICS codes listed on the registration.
What set-asides apply to NAICS 333618?: Common federal set-asides — Small Business (SBA), 8(a), HUBZone, SDVOSB, WOSB, EDWOSB — apply per solicitation, not per NAICS code. Each opportunity declares its own set-aside; Themis displays the eligibility class on every card so you can filter to ones you qualify for.

Popular industries

Explore federal contracting in other high-volume NAICS codes.

Browse by set-aside

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Federal contracts for NAICS 333618

Active opportunities in NAICS 333618

LUBE OIL COOLER

Top primes in NAICS 333618

Agencies buying NAICS 333618

Free capability statement builder for NAICS 333618 contractors

Frequently asked questions

Popular industries

Browse by set-aside

USNS WILLIAM MCLEAN Air Start Dehydrator

Engine, Diesel

STRAIN, RELIEF

29--SENSOR,ACCELEROMETE