PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NAS4121-017BHeat Sink,electrical-Electronic

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5999-01-209-0650 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-209-0650 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-209-0650. Primary manufacturer part number: NAS4121-017B.
Features
  • Heat Sink,electrical-Electronic — FSC 5999
  • Test Data Document: 81349-MIL-H-87111 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Specification/standard Data: 81349-MIL-H-87111/5 GOVERNMENT SPECIFICATION
  • Surface Treatment: ANODIZE
  • Material: ALUMINUM ALLOY
  • Test Data Document: 81349-MIL-H-87111 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Specification/standard Data: 81349-MIL-H-87111/5 GOVERNMENT SPECIFICATION
  • Surface Treatment: ANODIZE
Applications
  • Applications requiring Aluminum Alloy construction
General Description

The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-209-0650, is classified within Federal Supply Class 5999 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 commercial cross-references from 9 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-01-209-0650
Primary Part NumberNAS4121-017B
Item NameHeat Sink,electrical-Electronic
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusCANCELLED
Test Data Document81349-MIL-H-87111 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Specification/standard Data81349-MIL-H-87111/5 GOVERNMENT SPECIFICATION
Surface TreatmentANODIZE
MaterialALUMINUM ALLOY
Test Data Document81349-MIL-H-87111 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Specification/standard Data81349-MIL-H-87111/5 GOVERNMENT SPECIFICATION
Surface TreatmentANODIZE
MaterialALUMINUM ALLOY
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor5999-01-137-5400
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeDZ
Weight0.0600 lbs
Cube0.0074 cu ft
Verified Substitutes 12
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Cross-Reference Index
Part NumberManufacturer
MIL-H-87111/5 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
810AS2499-1 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA)
NAS4121-017B PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
75-68089-001 Raytheon E-Systems, Inc (USA)
NAS4121 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
M87111/05-1A17 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Z60-0005-001 L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications (USA)
6051B Thermalloy Co Inc (USA)
EC-H0005-001 Raytheon E-Systems, Inc (USA)
H030-303-0001 L3harris Interstate Electronics Corporation (USA)
5468382 Naval Sea Systems Command (USA)
0801C0026 Lockheed Martin Corporation Div Rms (USA)
Related Parts
SUCCESSOR 5999-01-137-5400 Heat Sink,electrical-Electronic
5999-01-205-3100SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-209-0651SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-209-0652SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-209-0654SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-209-0655SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-209-0656SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-209-0657SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-209-2812SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-209-2813SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-209-4597SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-210-2287SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC

Frequently Asked Questions

What is NSN 5999-01-209-0650?

NSN 5999-01-209-0650 is a Heat Sink,electrical-Electronic, manufactured by National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use, classified under FSC 5999 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5999-01-209-0650?

NSN 5999-01-209-0650 has 12 cross-referenced part numbers: MIL-H-87111/5 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 810AS2499-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), NAS4121-017B (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), 75-68089-001 (Raytheon E-Systems, Inc), NAS4121 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use) and 7 more.

What NSN replaces 5999-01-209-0650?

There are 12 known substitutes for 5999-01-209-0650: 5999-01-137-5400, 5999-01-205-3100, 5999-01-209-0651 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NAS4121-017B?

Key specifications for NAS4121-017B: Test Data Document: 81349-MIL-H-87111 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).; Overall Width: 1.810 INCHES NOMINAL IN; Overall Height: 0.500 INCHES NOMINAL IN; Specification/standard Data: 81349-MIL-H-87111/5 GOVERNMENT SPECIFICATION. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5999-01-209-0650 still in active supply?

NSN 5999-01-209-0650 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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