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B6390 — GEAR ASSEMBLY

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

B6390: GEAR ASSEMBLY.

The GEAR ASSEMBLY is a the manufacturer industrial component. Key specifications include end_item_identification: AIRCRAFT MODEL S-3A A, general_characteristics_item_description: CONSISTS OF 1 GEAR,PINION FSCM 72121 P/N B6392;1 GEAR,SPUR FSCM 72121 P/N B639. This part is cataloged in the U.S.

Government catalog under NSN 3010-00-571-9388, 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
B6390
NSN: 3010-00-571-9388
FSC: 3010 — Torque Converters and Speed Changers
CAGE: 17472 — EATON AEROSPACE LLC DBA EATON INOAC DIV FUEL & MOTION CONTROL SYSTEMS DIVISION (USA)
SPECIFICATIONS
end_item_identificationAIRCRAFT MODEL S-3A A
general_characteristics_item_descriptionCONSISTS OF 1 GEAR,PINION FSCM 72121 P/N B6392;1 GEAR,SPUR FSCM 72121 P/N B639
NSN3010-00-571-9388
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GEAR ASSEMBLY TITLE COMPONENT PN B6390 MFR GEAR ASSEMBLY
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: CONSISTS OF 1 GEAR,PINION FSCM 72121 P/N B6392;1 GEAR,SPUR FSCM 72121 P/N B639
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCONSISTS OF 1 GEAR,PINION FSCM 72121 P/N B6392;1 GEAR,SPUR FSCM 72121 P/N B639
END ITEM IDENTIFICATIONAIRCRAFT MODEL S-3A A
OTHER ITEMS IN FSC 3010 — Torque Converters and Speed Changers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3010-00-001-0013 3010-00-001-0067 3010-00-001-0069 3010-00-001-0095 3010-00-001-1239 3010-00-001-1689 3010-00-001-2168 3010-00-001-2173
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is B6390?
B6390 is a GEAR ASSEMBLY.
What is the NSN for B6390?
B6390 is cataloged in the U.S. Government catalog under NSN 3010-00-571-9388. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.