PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NAS4120-02LHeat Sink,electrical-Electronic

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5999-01-192-3273 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-192-3273 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-192-3273. Primary manufacturer part number: NAS4120-02L.
Features
  • Heat Sink,electrical-Electronic — FSC 5999
  • Surface Treatment: ANODIZE
  • Mounting Facility Type and Quantity: 2 THREADED HOLE(S) FIRST MOUNTING FACILITY
  • Nominal Thread Size: 0.112 INCHES FIRST MOUNTING FACILITY IN
  • Material: ALUMINUM ALLOY
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) FIRST MOUNTING FACILITY
  • Specification/standard Data: 81349-MIL-H-87111/4 GOVERNMENT SPECIFICATION
  • Thread Class: 2B FIRST MOUNTING FACILITY
Applications
  • Applications requiring Aluminum Alloy construction
General Description

The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-192-3273, 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 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-01-192-3273
Primary Part NumberNAS4120-02L
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
StatusACTIVE
Surface TreatmentANODIZE
Mounting Facility Type and Quantity2 THREADED HOLE(S) FIRST MOUNTING FACILITY
Nominal Thread Size0.112 INCHES FIRST MOUNTING FACILITY IN
MaterialALUMINUM ALLOY
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) FIRST MOUNTING FACILITY
Specification/standard Data81349-MIL-H-87111/4 GOVERNMENT SPECIFICATION
Thread Class2B FIRST MOUNTING FACILITY
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.).
Mounting Facility Type and Quantity6 UNTHREADED HOLE(S) SECOND MOUNTING FACILITY
Overall Diameter0.812 INCHES NOMINAL IN
Surface TreatmentANODIZE
Mounting Facility Type and Quantity2 THREADED HOLE(S) FIRST MOUNTING FACILITY
Nominal Thread Size0.112 INCHES FIRST MOUNTING FACILITY IN
MaterialALUMINUM ALLOY
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) FIRST MOUNTING FACILITY
Specification/standard Data81349-MIL-H-87111/4 GOVERNMENT SPECIFICATION
Thread Class2B FIRST MOUNTING FACILITY
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.).
Mounting Facility Type and Quantity6 UNTHREADED HOLE(S) SECOND MOUNTING FACILITY
Overall Diameter0.812 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor5999-01-134-1783
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeZN
Weight0.0100 lbs
Cube0.0028 cu ft
Verified Substitutes 11
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
5999-01-205-3101NAS4120-04B INTERCHANGEABLE
Heat Sink,electrical-Electronic
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
MIL-H-87111/4 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M87111/4-1-02H Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
NAS4120-02L Aerospace Industries Association of America Inc
M87111/04-1H02 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
NAS4120-02L PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
NAS4120 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
Related Parts
SUCCESSOR 5999-01-134-1783 Heat Sink,electrical-Electronic
5999-01-208-7300SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-208-7301SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-208-7302SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-233-0839SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-261-5428SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-310-6948SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-330-2659SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-399-3230SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-205-3101INTERCHANGEABLE
HEAT SINK,ELECTRICAL-ELECTRONIC
NAS4120-04B
5999-01-520-5159INTERCHANGEABLE
HEAT SINK,ELECTRICAL-ELECTRONIC
NAS4120-02B

Frequently Asked Questions

What is NSN 5999-01-192-3273?

NSN 5999-01-192-3273 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: active.

What are the part numbers for NSN 5999-01-192-3273?

NSN 5999-01-192-3273 has 6 cross-referenced part numbers: MIL-H-87111/4 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M87111/4-1-02H (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), NAS4120-02L (Aerospace Industries Association of America Inc), M87111/04-1H02 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), NAS4120-02L (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use) and 1 more.

What NSN replaces 5999-01-192-3273?

There are 11 known substitutes for 5999-01-192-3273: 5999-01-134-1783, 5999-01-208-7300, 5999-01-208-7301 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NAS4120-02L?

Key specifications for NAS4120-02L: Surface Treatment: ANODIZE; Mounting Facility Type and Quantity: 2 THREADED HOLE(S) FIRST MOUNTING FACILITY; Nominal Thread Size: 0.112 INCHES FIRST MOUNTING FACILITY IN; Material: ALUMINUM ALLOY. 22 total characteristics are documented in the Federal Logistics Information System.

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