NSN 5999-01-321-7452 · NIIN 013217452 · Part number 5543656
Naval Sea Systems Command · FSC 5999 — Miscellaneous Electrical and Electronic Components · FSG 59 — Electrical and Electronic Equipment Components · CAGE 53711
Government record, cited
NSN 5999-01-321-7452 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-321-7452. Manufacturer of record part number: 5543656.
Also searched as5999-01-321-7452 ·
5999013217452 ·
NIIN 013217452 ·
01-321-7452 ·
FSC 5999 Miscellaneous Electrical and Electronic Components · CAGE 53711 · 5543656
Nearby stock numbers← 5999-01-321-7428 Keyboard, Data Entry
·
5999-01-321-7457 Panel, Radio Frequency-Electromag →
Features
Heat Sink,electrical-Electronic — FSC 5999
Mounting Facility Type and Quantity: 2 THREADED HOLE(S) FIRST MOUNTING FACILITY
Mounting Facility Type and Quantity: 2 THREADED HOLE(S) SECOND MOUNTING FACILITY
Surface Treatment Document and Classification: MIL-T-10727; TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE
Material Document and Classification: QQ-C-576,1/8 TO 1/4 HARD FED SPEC SINGLE MATERIAL RESPONSE
Nominal Thread Size: 0.190 INCHES FIRST MOUNTING FACILITY IN
Nominal Thread Size: 0.112 INCHES SECOND MOUNTING FACILITY IN
Surface Treatment: TIN
Identification
NSN: 5999-01-321-7452
NIIN: 013217452
FSC: 5999 — Miscellaneous Electrical and Electronic Components
FSG: 59 — Electrical and Electronic Equipment Components
Primary part number: 5543656
Manufacturer: Naval Sea Systems Command
General Description
The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-321-7452, 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 Naval Sea Systems Command. Government technical data includes 8 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
5999-01-321-7452
Primary Part Number
5543656
Item Name
Heat Sink,electrical-Electronic
FSC / FSG
5999 / 59 — Miscellaneous Electrical and Electronic Components
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Mounting Facility Type and Quantity
2 THREADED HOLE(S) FIRST MOUNTING FACILITY
Mounting Facility Type and Quantity
2 THREADED HOLE(S) SECOND MOUNTING FACILITY
Surface Treatment Document and Classification
MIL-T-10727; TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE
Material Document and Classification
QQ-C-576,1/8 TO 1/4 HARD FED SPEC SINGLE MATERIAL RESPONSE
Nominal Thread Size
0.190 INCHES FIRST MOUNTING FACILITY IN
Nominal Thread Size
0.112 INCHES SECOND MOUNTING FACILITY IN
Surface Treatment
TIN
Material
COPPER ALLOY 102
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 5999-01-321-7452?
NSN 5999-01-321-7452 is a Heat Sink,electrical-Electronic, manufactured by Naval Sea Systems Command, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
What part numbers are listed for NSN 5999-01-321-7452?
NSN 5999-01-321-7452 has 2 manufacturer part numbers on file: 5543656 (Raytheon Company), 5543656 (Naval Sea Systems Command).
What are the specifications of 5543656?
Key specifications for 5543656: Mounting Facility Type and Quantity: 2 THREADED HOLE(S) FIRST MOUNTING FACILITY; Mounting Facility Type and Quantity: 2 THREADED HOLE(S) SECOND MOUNTING FACILITY; Overall Height: 0.700 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-T-10727; TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE. 8 specifications are documented in the U.S. Government catalog.
Is NSN 5999-01-321-7452 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.