NSN 5999-01-591-5666 · NIIN 015915666 · Part number 04-21321
Department of Defense Project Manager-Mobile Electric Power · FSC 5999 — Miscellaneous Electrical and Electronic Components · FSG 59 — Electrical and Electronic Equipment Components · CAGE 30554
Government record, cited
NSN 5999-01-591-5666 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-591-5666. Manufacturer of record part number: 04-21321.
Also searched as5999-01-591-5666 ·
5999015915666 ·
NIIN 015915666 ·
01-591-5666 ·
FSC 5999 Miscellaneous Electrical and Electronic Components · CAGE 30554 · 04-21321 · A029F369
Material Document and Classification: ASTM A240 ASSN STD SINGLE MATERIAL RESPONSE
Material: STEEL
2 manufacturer part numbers on file
Manufacturer of record: Department of Defense Project Manager-Mobile Electric Power
Identification
NSN: 5999-01-591-5666
NIIN: 015915666
FSC: 5999 — Miscellaneous Electrical and Electronic Components
FSG: 59 — Electrical and Electronic Equipment Components
Primary part number: 04-21321
Manufacturer: Department of Defense Project Manager-Mobile Electric Power
General Description
The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-591-5666, is classified within Federal Supply Class 5999 (Miscellaneous Electrical and Electronic Components) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Department of Defense Project Manager-Mobile Electric Power. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active. Unit of issue: EA.
Technical Specifications
Parameter
Value
NSN
5999-01-591-5666
Primary Part Number
04-21321
Item Name
Heat Sink,electrical-Electronic
FSC / FSG
5999 / 59 — Miscellaneous Electrical and Electronic Components
Manufacturer
Department of Defense Project Manager-Mobile Electric Power
Status
ACTIVE
Material Document and Classification
ASTM A240 ASSN STD SINGLE MATERIAL RESPONSE
Material
STEEL
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Department of Defense Project Manager-Mobile Electric Power (USA)
No interchangeability data on file.
Other items in FSC 5999 — Miscellaneous Electrical and Electronic Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5999-00-001-1345
5999-00-001-1345 · Item name not on file
5999-00-001-1346
5999-00-001-1346 · Item name not on file
5999-00-001-1348
5999-00-001-1348 · Item name not on file
5999-00-001-1349
5999-00-001-1349 · Item name not on file
5999-00-001-1355
5999-00-001-1355 · Item name not on file
5999-00-001-1623
5999-00-001-1623 · Item name not on file
5999-00-001-2537
5999-00-001-2537 · Item name not on file
5999-00-001-2539
5999-00-001-2539 · Item name not on file
Frequently Asked Questions
What is NSN 5999-01-591-5666?
NSN 5999-01-591-5666 is a Heat Sink,electrical-Electronic, manufactured by Department of Defense Project Manager-Mobile Electric Power, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
What part numbers are listed for NSN 5999-01-591-5666?
NSN 5999-01-591-5666 has 2 manufacturer part numbers on file: A029F369 (Cummins Power Generation Inc.), 04-21321 (Department of Defense Project Manager-Mobile Electric Power).
What are the specifications of 04-21321?
Key specifications for 04-21321: Material Document and Classification: ASTM A240 ASSN STD SINGLE MATERIAL RESPONSE; Part Name Assigned by Controlling Agency: SHIELD,HEAT,5KW; End Item Identification: 6115-01-561-7329; Material: STEEL. 2 specifications are documented in the U.S. Government catalog.
Is NSN 5999-01-591-5666 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.