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GR831AA1 — Cooling Component Specs

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NORTHROP GRUMMAN SYSTEMS CORPORATION · FAN MODULE
WHAT YOU NEED TO KNOW
Hot-plug fans can be replaced without shutdown Dual-rotor = higher CFM for high-power configs (GPU, dense storage)
AIRFLOW DIRECTION IS CRITICAL — reversed fan = thermal shutdown
PRODUCT OVERVIEW

HEAT SINK,ELECTRICAL-ELECTRONIC. Key specifications include MATERIAL: COPPER ALLOY, OVERALL WIDTH: 0.351 INCHES NOMINAL IN, OVERALL HEIGHT: 0.250 INCHES NOMINAL IN, OVERALL LENGTH: 0.400 INCHES NOMINAL IN, UNTHREADED MOUNTING HOLE DIAMETER: 0.032 INCHES NOMINAL SINGLE MOUNTING FACILITY IN, MOUNTING FACILITY TYPE AND QUANTITY: 2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-00-603-7869, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
GR831AA1
NSN: 5999-00-603-7869
FSC: 5999
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
MATERIALCOPPER ALLOY
OVERALL WIDTH0.351 INCHES NOMINAL IN
OVERALL HEIGHT0.250 INCHES NOMINAL IN
OVERALL LENGTH0.400 INCHES NOMINAL IN
UNTHREADED MOUNTING HOLE DIAMETER0.032 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
MOUNTING FACILITY TYPE AND QUANTITY2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
NSN5999-00-603-7869
COMPONENT DIAGRAM
HANDLE 60mm 60mm HOT-PLUG COOL IN HOT OUT DUAL ROTOR HOT-SWAP FAN MODULE | 60mm Dual Rotor | FRONT-TO-BACK Hot-plug | Redundant | TITLE FAN MODULE PN GR831AA1 MFR NORTHROP GRUMMAN SYSTEMS CORPORATION HEAT SINK,ELECTRICAL-ELECTRONIC
KEY FEATURES
•
MATERIAL: COPPER ALLOY
•
MOUNTING FACILITY TYPE AND QUANTITY: 2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
•
UNTHREADED MOUNTING HOLE DIAMETER: 0.032 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY
MOUNTING FACILITY TYPE AND QUANTITY2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
UNTHREADED MOUNTING HOLE DIAMETER0.032 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
OVERALL LENGTH0.400 INCHES NOMINAL IN
OVERALL HEIGHT0.250 INCHES NOMINAL IN
OVERALL WIDTH0.351 INCHES NOMINAL IN
MATERIALCOPPER ALLOY
MOUNTING FACILITY TYPE AND QUANTITY2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
UNTHREADED MOUNTING HOLE DIAMETER0.032 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
OVERALL LENGTH0.400 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
1130Upgraded Successor
successor cross-reference
successor
U125-09Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMATSourcing: other
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FREQUENTLY ASKED QUESTIONS
What is GR831AA1?
GR831AA1 is a HEAT SINK,ELECTRICAL-ELECTRONIC manufactured by NORTHROP GRUMMAN SYSTEMS CORPORATION.
What parts can replace GR831AA1?
There are 2 known substitutes for GR831AA1: 1130, U125-09. Substitute compatibility should be verified for your specific system.
What is the NSN for GR831AA1?
GR831AA1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-00-603-7869. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026