PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NAS4121-016BHeat Sink,electrical-Electronic

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5999-01-183-9737 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-183-9737 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-183-9737. Primary manufacturer part number: NAS4121-016B.
Features
  • Heat Sink,electrical-Electronic — FSC 5999
  • Surface Treatment Document and Classification: MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE
  • Surface Treatment: ANODIZE
  • Material: ALUMINUM
  • Material Document and Classification: QQ-A-250 FED SPEC SINGLE MATERIAL RESPONSE
  • Surface Treatment Document and Classification: MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE
  • Surface Treatment: ANODIZE
  • Material: ALUMINUM
Applications
  • Applications requiring Aluminum construction
General Description

The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-183-9737, 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 9 commercial cross-references from 5 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
NSN5999-01-183-9737
Primary Part NumberNAS4121-016B
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
Surface Treatment Document and ClassificationMIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE
Surface TreatmentANODIZE
MaterialALUMINUM
Material Document and ClassificationQQ-A-250 FED SPEC SINGLE MATERIAL RESPONSE
Surface Treatment Document and ClassificationMIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE
Surface TreatmentANODIZE
MaterialALUMINUM
Material Document and ClassificationQQ-A-250 FED SPEC SINGLE MATERIAL RESPONSE
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor5999-01-082-6326 (800482)
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeZN
Weight0.0200 lbs
Cube0.0130 cu ft
Verified Substitutes 12
5999-01-082-6326800482 SUCCESSOR
Heat Sink,electrical-Electronic
Raytheon Company Dba Raytheon
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
1205-0289 Hewlett-Packard Company Dba HP (USA)
1205-0289 Keysight Technologies, Inc. (USA)
M87111/5-1A16 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
A-1205-0289-1 Agilent Technologies, Inc. Div Agilent Technologies Headquarters (USA)
MIL-H-87111/5 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
NAS4121-016B PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
M87111/05-1A16 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
NAS4121 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
A-1205-0289-1 Hewlett-Packard Company Dba HP (USA)
Related Parts
SUCCESSOR 5999-01-082-6326 Heat Sink,electrical-Electronic · 800482
5999-01-137-5400SUCCESSOR
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

Frequently Asked Questions

What is NSN 5999-01-183-9737?

NSN 5999-01-183-9737 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 5999-01-183-9737?

NSN 5999-01-183-9737 has 9 cross-referenced part numbers: 1205-0289 (Hewlett-Packard Company Dba HP), 1205-0289 (Keysight Technologies, Inc.), M87111/5-1A16 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), A-1205-0289-1 (Agilent Technologies, Inc. Div Agilent Technologies Headquarters), MIL-H-87111/5 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 4 more.

What NSN replaces 5999-01-183-9737?

There are 12 known substitutes for 5999-01-183-9737: 5999-01-082-6326, 5999-01-137-5400, 5999-01-205-3100 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NAS4121-016B?

Key specifications for NAS4121-016B: Surface Treatment Document and Classification: MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE; Overall Width: 1.400 INCHES NOMINAL IN; Surface Treatment: ANODIZE; Material: ALUMINUM. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5999-01-183-9737 still in active supply?

NSN 5999-01-183-9737 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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