PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SK138502Heat Sink,electrical-Electronic

Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp · NSN 5999-00-368-4131 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-368-4131 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-368-4131. Primary manufacturer part number: SK138502.
Features
  • Heat Sink,electrical-Electronic — FSC 5999
  • Material: ALUMINUM ALLOY 6061
  • Surface Treatment: CHROMATE
  • Material Document and Classification: QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
  • Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE
  • Material: ALUMINUM ALLOY 6061
  • Surface Treatment: CHROMATE
  • Material Document and Classification: QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
Applications
  • Applications requiring Aluminum Alloy 6061 construction
General Description

The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-00-368-4131, 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 Systems Corporation Dba Northrop Grumman Systems Corp. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-00-368-4131
Primary Part NumberSK138502
Item NameHeat Sink,electrical-Electronic
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
StatusACTIVE
MaterialALUMINUM ALLOY 6061
Surface TreatmentCHROMATE
Material Document and ClassificationQQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
Surface Treatment Document and ClassificationMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE
MaterialALUMINUM ALLOY 6061
Surface TreatmentCHROMATE
Material Document and ClassificationQQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
Surface Treatment Document and ClassificationMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeX
Verified Substitutes 4
5310-00-013-8502 INTERCHANGEABLE
Washer,lock
1336-00-070-2472 INTERCHANGEABLE
Generator,gas Pressure,propellan
2915-00-942-86639-665-4 INTERCHANGEABLE
Housing,valve,nomodulating,fuel
Parker-Hannifin Corporation Dba Pneutronics
5310-01-199-9471138502 INTERCHANGEABLE
Washer,lock
Caterpillar Inc Div Caterpillar Defense
Cross-Reference Index
Part NumberManufacturer
SK138502 PRIMARY Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
138502 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
Related Parts
5310-00-013-8502INTERCHANGEABLE
WASHER,LOCK
1336-00-070-2472INTERCHANGEABLE
GENERATOR,GAS PRESSURE,PROPELLAN
2915-00-942-8663INTERCHANGEABLE
HOUSING,VALVE,NOMODULATING,FUEL
9-665-4
5310-01-199-9471INTERCHANGEABLE
WASHER,LOCK
138502

Frequently Asked Questions

What is NSN 5999-00-368-4131?

NSN 5999-00-368-4131 is a Heat Sink,electrical-Electronic, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-368-4131?

NSN 5999-00-368-4131 has 2 cross-referenced part numbers: SK138502 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp), 138502 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).

What NSN replaces 5999-00-368-4131?

There are 4 known substitutes for 5999-00-368-4131: 5310-00-013-8502, 1336-00-070-2472, 2915-00-942-8663 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SK138502?

Key specifications for SK138502: Overall Length: 3.475 INCHES NOMINAL IN; Material: ALUMINUM ALLOY 6061; Overall Height: 0.470 INCHES NOMINAL IN; Surface Treatment: CHROMATE. 14 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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