Federal NAICS Codes

NAICS 335311

Power, Distribution, and Specialty Transformer Manufacturing

Explore obligations, trends, recent awards, and incumbent contractors for NAICS 335311.

NAICS 335311 federal market metrics

Total obligations
$4B
Total awards
46,521 awards
Active obligations
$423M
Size standard
800 employees

What this NAICS covers

NAICS 335311 covers manufacturing power, distribution, and specialty transformers, including winding, core assembly, insulation, tank fabrication, assembly, factory testing, and production of transformers for electrical distribution and specialty applications.

Federal opportunities under 335311 typically involve supplying manufactured transformer units that meet specified performance and testing criteria, including factory acceptance testing, production quality records, transportation and handling for energized systems, spare part provisioning, and on-site delivery coordination.

FY2025 snapshot

Obligations
$304.2M
Awards
3,557
Average award
$85.5K
Change from FY2024
+6.8%

Recent awards

Search contractors

$26,198

AEROBASE GROUP INC

US Coast Guard

PIID
70Z08526P40113B00
PSC
6130 - CONVERTERS, ELECTRICAL, NONROTATING

$79,940

ELECTRO-MECHANICAL, LLC

Federal Prison System / Bureau of Prisons

PIID
15B50226P00000200
PSC
6150 - MISCELLANEOUS ELECTRIC POWER AND DISTRIBUTION EQUIPMENT

$18,026

AVTRON POWER SOLUTIONS, LLC

Department of State

PIID
19MX5326P0839
PSC
6150 - MISCELLANEOUS ELECTRIC POWER AND DISTRIBUTION EQUIPMENT

$316,018

VETERAN LEGACY LLC

US Coast Guard

PIID
70Z08526P30020B00
PSC
5950 - COILS AND TRANSFORMERS

$60,952

EATON CORPORATION

Federal Prison System / Bureau of Prisons

PIID
15B21826P00000042
PSC
5975 - ELECTRICAL HARDWARE AND SUPPLIES

$19,990

MISCELLANEOUS FOREIGN AWARDEES

Department of State

PIID
19SF7526P0287
PSC
J030 - MAINT/REPAIR/REBUILD OF EQUIPMENT- MECHANICAL POWER TRANSMISSION EQUIPMENT

FAQ

What work fits NAICS 335311?
  • Procurement of pad-mounted distribution transformers delivered and factory-tested with specified kVA, voltage ratings, and tap settings.
  • Supply of custom specialty transformers for mission-critical equipment with defined winding configurations, insulation class, and factory acceptance test reports.
  • Replacement dry-type transformers for substations delivered with dielectric and load-loss test certificates and nameplate data.
  • Stocking contract for spare transformer coils, tanks, and factory-fabricated components with drawings, serial-number traceability, and test documentation.
When is NAICS 335311 a weak fit?
  • Electrical construction and installation contracts that require onsite cable routing, grounding, and setting of equipment rather than supply of new manufactured transformer units.
  • Transformer repair, rewinding, or field reconditioning services performed on installed units where the deliverable is service rather than a new manufactured transformer.
  • Power system engineering procurements focused on relay protection, system studies, or switching design where fabrication of transformer hardware is not part of the scope.
What solicitation language points to NAICS 335311?
  • Line items specify manufactured unit delivery with nameplate data, kVA, voltage, impedance, and specified tap-changer settings rather than hourly installation labor.
  • RFP requires factory acceptance testing records, dielectric and load-loss test results, and material traceability for each shipped transformer.
  • Evaluation criteria weight OEM manufacturing QA, production lead time, and submitted factory test procedures rather than installer staffing or site electrical crews.

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