PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NAS4117C51Heat Sink-Insulator

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5999-01-395-2474 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-395-2474 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-395-2474. Primary manufacturer part number: NAS4117C51.
Features
  • Heat Sink-Insulator — FSC 5999
  • Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
  • Unthreaded Mounting Hole Diameter: 0.062 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Body Style: BOARD MOUNTEDBOARD MOUNTED
  • Material: RUBBER SILICONE CLASS Q
  • Operating Power Dissipating Rating in Watts: 0.6
  • Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
  • Unthreaded Mounting Hole Diameter: 0.062 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Applications
  • Applications requiring Rubber Silicone Class Q construction
General Description

The Heat Sink-Insulator, cataloged under National Stock Number 5999-01-395-2474, 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 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 4 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
NSN5999-01-395-2474
Primary Part NumberNAS4117C51
Item NameHeat Sink-Insulator
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusCANCELLED
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Unthreaded Mounting Hole Diameter0.062 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Body StyleBOARD MOUNTEDBOARD MOUNTED
MaterialRUBBER SILICONE CLASS Q
Operating Power Dissipating Rating in Watts0.6
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Unthreaded Mounting Hole Diameter0.062 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Body StyleBOARD MOUNTEDBOARD MOUNTED
MaterialRUBBER SILICONE CLASS Q
Operating Power Dissipating Rating in Watts0.6
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor5999-01-105-4991
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJ
Verified Substitutes 12
No Item Name Available
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
5999-01-384-2619NAS4121-370B SUCCESSOR
Heat Sink,electrical-Electronic
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
Cross-Reference Index
Part NumberManufacturer
M87111/01-6Y51 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-H-87111/1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
NAS4117C51 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
M87111/01-7Y51 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
NAS4117 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
MIL-H-87111 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
1009-23 Henkel Corporation (USA)
090165 L3 Technologies, Inc. Div L3 Keo (USA)
Related Parts
SUCCESSOR 5999-01-105-4991 Heat Sink,electrical-Electronic
5999-01-390-4033SUCCESSOR
NO ITEM NAME AVAILABLE
5999-01-202-9730SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-202-9731SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-203-6128SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-203-6130SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-204-3731SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-384-2619SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
NAS4121-370B
5999-01-395-3752SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-399-3230SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-416-4384SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-420-7753SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC

Frequently Asked Questions

What is NSN 5999-01-395-2474?

NSN 5999-01-395-2474 is a Heat Sink-Insulator, 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 5999-01-395-2474?

NSN 5999-01-395-2474 has 8 cross-referenced part numbers: M87111/01-6Y51 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-H-87111/1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), NAS4117C51 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), M87111/01-7Y51 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), NAS4117 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use) and 3 more.

What NSN replaces 5999-01-395-2474?

There are 12 known substitutes for 5999-01-395-2474: 5999-01-390-4033, 5999-01-105-4991, 5999-01-202-9730 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NAS4117C51?

Key specifications for NAS4117C51: Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Height: 1.110 INCHES NOMINAL1.110 INCHES NOMINAL IN; Unthreaded Mounting Hole Diameter: 0.062 INCHES NOMINAL SINGLE MOUNTING FACILITY IN; Body Style: BOARD MOUNTEDBOARD MOUNTED. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5999-01-395-2474 still in active supply?

NSN 5999-01-395-2474 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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