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666L2 — DAMPER,VALVE,BY-PASS,ENGINE EXHA

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

666L2: DAMPER,VALVE,BY-PASS,ENGINE EXHA.

DAMPER,VALVE,BY-PASS,ENGINE EXHA. Key specifications include end_item_identification: 2320-835-8344, general_characteristics_item_description: CONSISTS OF A STEEL BLADE BOLTED TO A SHAFT. This part is cataloged in the U.S.

Government catalog under NSN 2990-00-304-9409, 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
666L2
NSN: 2990-00-304-9409
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
end_item_identification2320-835-8344
general_characteristics_item_descriptionCONSISTS OF A STEEL BLADE BOLTED TO A SHAFT
NSN2990-00-304-9409
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available DAMPER,VALVE,BY-PASS,ENGINE EXHA TITLE COMPONENT PN 666L2 MFR DAMPER,VALVE,BY-PASS,E
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: CONSISTS OF A STEEL BLADE BOLTED TO A SHAFT
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCONSISTS OF A STEEL BLADE BOLTED TO A SHAFT
END ITEM IDENTIFICATION2320-835-8344
OTHER ITEMS IN FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
2990-00-001-0001 2990-00-001-1248 2990-00-001-1250 2990-00-001-2055 2990-00-001-3498 2990-00-001-3520 2990-00-001-3521 2990-00-001-3522
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)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 666L2?
666L2 is a DAMPER,VALVE,BY-PASS,ENGINE EXHA.
What is the NSN for 666L2?
666L2 is cataloged in the U.S. Government catalog under NSN 2990-00-304-9409. 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.