NSN 5999-01-245-9761 · NIIN 012459761 · Part number B4040161
Lockheed Martin Librascope Corporation · FSC 5999 — Miscellaneous Electrical and Electronic Components · FSG 59 — Electrical and Electronic Equipment Components · CAGE 36090
Government record, cited
NSN 5999-01-245-9761 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-245-9761. Manufacturer of record part number: B4040161.
Also searched as5999-01-245-9761 ·
5999012459761 ·
NIIN 012459761 ·
01-245-9761 ·
FSC 5999 Miscellaneous Electrical and Electronic Components · CAGE 36090 · B4040161
Surface Treatment Document and Classification: MIL-C-5541,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE
Material Document and Classification: QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
Surface Treatment: CHROMATE
Material: ALUMINUM ALLOY 6061
2 manufacturer part numbers on file
Manufacturer of record: Lockheed Martin Librascope Corporation
Identification
NSN: 5999-01-245-9761
NIIN: 012459761
FSC: 5999 — Miscellaneous Electrical and Electronic Components
FSG: 59 — Electrical and Electronic Equipment Components
Primary part number: B4040161
Manufacturer: Lockheed Martin Librascope Corporation
General Description
The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-245-9761, 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 Lockheed Martin Librascope Corporation. Government technical data includes 4 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
5999-01-245-9761
Primary Part Number
B4040161
Item Name
Heat Sink,electrical-Electronic
FSC / FSG
5999 / 59 — Miscellaneous Electrical and Electronic Components
Manufacturer
Lockheed Martin Librascope Corporation
Status
ACTIVE
Surface Treatment Document and Classification
MIL-C-5541,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE
Material Document and Classification
QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
Surface Treatment
CHROMATE
Material
ALUMINUM ALLOY 6061
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
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 5999-01-245-9761?
NSN 5999-01-245-9761 is a Heat Sink,electrical-Electronic, manufactured by Lockheed Martin Librascope Corporation, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
What part numbers are listed for NSN 5999-01-245-9761?
NSN 5999-01-245-9761 has 2 manufacturer part numbers on file: B4040161 (Department of the Army Hq United States Army Communications Research and Development Command), B4040161 (Lockheed Martin Librascope Corporation).
What are the specifications of B4040161?
Key specifications for B4040161: Overall Height: 0.250 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-5541,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE; Material Document and Classification: QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE; Overall Length: 2.880 INCHES NOMINAL IN. 4 specifications are documented in the U.S. Government catalog.
Is NSN 5999-01-245-9761 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.