PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M87111/2-2B05Heat Sink,electrical-Electronic

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5999-01-276-1197 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-276-1197 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-276-1197. Primary manufacturer part number: M87111/2-2B05.
Features
  • Heat Sink,electrical-Electronic — FSC 5999
  • Surface Treatment: CHROMATE
  • Nominal Thread Size: 0.112 INCHES SINGLE MOUNTING FACILITY IN
  • Specification/standard Data: 81349-MIL-H-877111/2 GOVERNMENT SPECIFICATION
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
  • Thread Class: 2B SINGLE MOUNTING FACILITY
  • Mounting Facility Type and Quantity: 1 THREADED HOLE(S) SINGLE MOUNTING FACILITY
  • Material: COPPER ALLOY 172
Applications
  • Applications requiring Copper Alloy 172 construction
General Description

The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-276-1197, 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 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-01-276-1197
Primary Part NumberM87111/2-2B05
Item NameHeat Sink,electrical-Electronic
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Surface TreatmentCHROMATE
Nominal Thread Size0.112 INCHES SINGLE MOUNTING FACILITY IN
Specification/standard Data81349-MIL-H-877111/2 GOVERNMENT SPECIFICATION
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Thread Class2B SINGLE MOUNTING FACILITY
Mounting Facility Type and Quantity1 THREADED HOLE(S) SINGLE MOUNTING FACILITY
MaterialCOPPER ALLOY 172
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.).
Surface TreatmentCHROMATE
Nominal Thread Size0.112 INCHES SINGLE MOUNTING FACILITY IN
Specification/standard Data81349-MIL-H-877111/2 GOVERNMENT SPECIFICATION
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Thread Class2B SINGLE MOUNTING FACILITY
Mounting Facility Type and Quantity1 THREADED HOLE(S) SINGLE MOUNTING FACILITY
MaterialCOPPER ALLOY 172
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.).
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeJN
Verified Substitutes 10
No Item Name Available
5999-01-173-3176NAS4118E01K SUCCESSOR
Heat Sink,electrical-Electronic
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5999-01-174-3168NAS4118E05H SUCCESSOR
Heat Sink,electrical-Electronic
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5999-01-211-1617NAS4118F12D SUCCESSOR
Heat Sink,electrical-Electronic
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5999-01-216-8588NAS4118E16C SUCCESSOR
Heat Sink,electrical-Electronic
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5999-01-319-4133NAS4118-G24C SUCCESSOR
Heat Sink,electrical-Electronic
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5999-01-328-5037NAS4118E16H SUCCESSOR
Heat Sink,electrical-Electronic
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5999-01-372-4067NAS4118F08D SUCCESSOR
Heat Sink,electrical-Electronic
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5999-01-411-1080NAS4118G27C SUCCESSOR
Heat Sink,electrical-Electronic
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5999-01-498-4393NAS4118F15C SUCCESSOR
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
M87111/2-2B05 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-H-87111/2 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M87111/02-2B05 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5999-01-368-8836SUCCESSOR
NO ITEM NAME AVAILABLE
5999-01-173-3176SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
NAS4118E01K
5999-01-174-3168SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
NAS4118E05H
5999-01-211-1617SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
NAS4118F12D
5999-01-216-8588SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
NAS4118E16C
5999-01-319-4133SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
NAS4118-G24C
5999-01-328-5037SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
NAS4118E16H
5999-01-372-4067SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
NAS4118F08D
5999-01-411-1080SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
NAS4118G27C
5999-01-498-4393SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
NAS4118F15C

Frequently Asked Questions

What is NSN 5999-01-276-1197?

NSN 5999-01-276-1197 is a Heat Sink,electrical-Electronic, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5999 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5999-01-276-1197?

NSN 5999-01-276-1197 has 3 cross-referenced part numbers: M87111/2-2B05 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-H-87111/2 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M87111/02-2B05 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5999-01-276-1197?

There are 10 known substitutes for 5999-01-276-1197: 5999-01-368-8836, 5999-01-173-3176, 5999-01-174-3168 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of M87111/2-2B05?

Key specifications for M87111/2-2B05: Surface Treatment: CHROMATE; Overall Length: 0.390 INCHES NOMINAL IN; Overall Height: 0.360 INCHES NOMINAL IN; Nominal Thread Size: 0.112 INCHES SINGLE MOUNTING FACILITY IN. 24 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5999-01-276-1197 still in active supply?

NSN 5999-01-276-1197 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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