PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

63139-7Heat Sink,electrical-Electronic

Instruments and Flight Research, Inc. · NSN 5999-00-401-7711 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-401-7711 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-401-7711. Primary manufacturer part number: 63139-7.
Features
  • Heat Sink,electrical-Electronic — FSC 5999
  • Overall Diameter: 1.250 INCHES NOMINAL IN
  • Material: BERYLLIUM OXIDE
  • Overall Diameter: 1.250 INCHES NOMINAL IN
  • Material: BERYLLIUM OXIDE
  • 4 verified cross-references
  • Primary manufacturer: Instruments and Flight Research, Inc.
Applications
  • Applications requiring Beryllium Oxide construction
General Description

The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-00-401-7711, 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 Instruments and Flight Research, Inc.. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-00-401-7711
Primary Part Number63139-7
Item NameHeat Sink,electrical-Electronic
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerInstruments and Flight Research, Inc.
StatusACTIVE
Overall Diameter1.250 INCHES NOMINAL IN
MaterialBERYLLIUM OXIDE
Overall Diameter1.250 INCHES NOMINAL IN
MaterialBERYLLIUM OXIDE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJN
Weight0.0050 lbs
Cube0.0001 cu ft
Verified Substitutes 2
Heat Sink,electrical-Electronic
5920-00-702-6694 INTERCHANGEABLE
Fuse,indicator Alarm
Cross-Reference Index
Part NumberManufacturer
CG3848-1 General Ceramics Inc National Beryllia Div (USA)
63139-7 PRIMARY Instruments and Flight Research, Inc. (USA)
BMT14 General Ceramics Inc National Beryllia Div (USA)
CG-3848-001 American Beryllia Inc (USA)
Related Parts
5999-01-097-3867SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5920-00-702-6694INTERCHANGEABLE
FUSE,INDICATOR ALARM

Frequently Asked Questions

What is NSN 5999-00-401-7711?

NSN 5999-00-401-7711 is a Heat Sink,electrical-Electronic, manufactured by Instruments and Flight Research, Inc., classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-401-7711?

NSN 5999-00-401-7711 has 4 cross-referenced part numbers: CG3848-1 (General Ceramics Inc National Beryllia Div), 63139-7 (Instruments and Flight Research, Inc.), BMT14 (General Ceramics Inc National Beryllia Div), CG-3848-001 (American Beryllia Inc).

What NSN replaces 5999-00-401-7711?

There are 2 known substitutes for 5999-00-401-7711: 5999-01-097-3867, 5920-00-702-6694. Verify interchangeability with system specifications before substitution.

What are the specifications of 63139-7?

Key specifications for 63139-7: Overall Diameter: 1.250 INCHES NOMINAL IN; Material: BERYLLIUM OXIDE; Overall Diameter: 1.250 INCHES NOMINAL IN; Material: BERYLLIUM OXIDE. 4 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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