PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NAS4117C59Heat Sink-Insulator

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5999-01-202-9727 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-202-9727 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-202-9727. Primary manufacturer part number: NAS4117C59.
Features
  • Heat Sink-Insulator — FSC 5999
  • Overall Diameter: 0.510 INCHES NOMINAL0.510 INCHES NOMINAL IN
  • Mounting Facility Type and Quantity: 1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
  • Material: BERYLLIUM OXIDE
  • Material Document and Classification: MIL-I-10 MIL SPEC SINGLE MATERIAL RESPONSE
  • Unthreaded Mounting Hole Diameter: 0.200 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Overall Diameter: 0.510 INCHES NOMINAL0.510 INCHES NOMINAL IN
  • Mounting Facility Type and Quantity: 1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Applications
  • Applications requiring Beryllium Oxide construction
General Description

The Heat Sink-Insulator, cataloged under National Stock Number 5999-01-202-9727, 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 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-01-202-9727
Primary Part NumberNAS4117C59
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
StatusACTIVE
Overall Diameter0.510 INCHES NOMINAL0.510 INCHES NOMINAL IN
Mounting Facility Type and Quantity1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
MaterialBERYLLIUM OXIDE
Material Document and ClassificationMIL-I-10 MIL SPEC SINGLE MATERIAL RESPONSE
Unthreaded Mounting Hole Diameter0.200 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Overall Diameter0.510 INCHES NOMINAL0.510 INCHES NOMINAL IN
Mounting Facility Type and Quantity1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
MaterialBERYLLIUM OXIDE
Material Document and ClassificationMIL-I-10 MIL SPEC SINGLE MATERIAL RESPONSE
Unthreaded Mounting Hole Diameter0.200 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor5999-01-150-8828
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeJN
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-87111/1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M87111/01-4Y27 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)
2015-20 Henkel Corporation (USA)
NAS4117C59 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
M87111/01-6Y59 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
SUCCESSOR 5999-01-150-8828 Heat Sink,electrical-Electronic
5999-01-177-2887SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-197-2731SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-202-9719SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-202-9730SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-202-9731SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-202-9733SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-203-6128SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-203-6130SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-203-7224SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-203-7225SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-204-3730SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC

Frequently Asked Questions

What is NSN 5999-01-202-9727?

NSN 5999-01-202-9727 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: active.

What are the part numbers for NSN 5999-01-202-9727?

NSN 5999-01-202-9727 has 6 cross-referenced part numbers: MIL-H-87111/1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M87111/01-4Y27 (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), 2015-20 (Henkel Corporation), NAS4117C59 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use) and 1 more.

What NSN replaces 5999-01-202-9727?

There are 12 known substitutes for 5999-01-202-9727: 5999-01-150-8828, 5999-01-177-2887, 5999-01-197-2731 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NAS4117C59?

Key specifications for NAS4117C59: Overall Diameter: 0.510 INCHES NOMINAL0.510 INCHES NOMINAL IN; Mounting Facility Type and Quantity: 1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY; Material: BERYLLIUM OXIDE; Material Document and Classification: MIL-I-10 MIL SPEC SINGLE MATERIAL RESPONSE. 12 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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