PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

347C403H03Heat Sink,electrical-Electronic

Northrop Grumman Support Services Corp · NSN 5999-01-018-1071 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-018-1071 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-018-1071. Primary manufacturer part number: 347C403H03.
Features
  • Heat Sink,electrical-Electronic — FSC 5999
  • Surface Treatment: ANODIZE
  • Special Test Features: TESTED IN ACCORDANCE W/MIL-Q-21549B-SP24-1
  • Material: ALUMINUM
  • Surface Treatment: ANODIZE
  • Special Test Features: TESTED IN ACCORDANCE W/MIL-Q-21549B-SP24-1
  • Material: ALUMINUM
  • 2 verified cross-references
Applications
  • Applications requiring Aluminum construction
General Description

The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-018-1071, 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 Northrop Grumman Support Services Corp. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 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
NSN5999-01-018-1071
Primary Part Number347C403H03
Item NameHeat Sink,electrical-Electronic
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerNorthrop Grumman Support Services Corp
StatusACTIVE
Surface TreatmentANODIZE
Special Test FeaturesTESTED IN ACCORDANCE W/MIL-Q-21549B-SP24-1
MaterialALUMINUM
Surface TreatmentANODIZE
Special Test FeaturesTESTED IN ACCORDANCE W/MIL-Q-21549B-SP24-1
MaterialALUMINUM
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor5999-00-235-8482
HAZMATNo
Shelf Life Code0
Criticality Code1
Unit of IssueEA
SMR CodeYZ
Weight0.0120 lbs
Cube0.0017 cu ft
Verified Substitutes 2
Heat Sink,electrical-Electronic
5999-00-783-8003352-9869-000 SUCCESSOR
Heat Sink,electrical-Electronic
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
Cross-Reference Index
Part NumberManufacturer
347C403H03 PRIMARY Northrop Grumman Support Services Corp (USA)
347C403H03 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
Related Parts
SUCCESSOR 5999-00-235-8482 Heat Sink,electrical-Electronic
5999-00-783-8003SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
352-9869-000

Frequently Asked Questions

What is NSN 5999-01-018-1071?

NSN 5999-01-018-1071 is a Heat Sink,electrical-Electronic, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-01-018-1071?

NSN 5999-01-018-1071 has 2 cross-referenced part numbers: 347C403H03 (Northrop Grumman Support Services Corp), 347C403H03 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).

What NSN replaces 5999-01-018-1071?

There are 2 known substitutes for 5999-01-018-1071: 5999-00-235-8482, 5999-00-783-8003. Verify interchangeability with system specifications before substitution.

What are the specifications of 347C403H03?

Key specifications for 347C403H03: Surface Treatment: ANODIZE; Special Test Features: TESTED IN ACCORDANCE W/MIL-Q-21549B-SP24-1; Material: ALUMINUM; Surface Treatment: ANODIZE. 6 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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