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C4B1645-21 — TORQUE TUBE ASSEMBLY,AIRCRAFT

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

C4B1645-21: TORQUE TUBE ASSEMBLY,AIRCRAFT.

The TORQUE TUBE ASSEMBLY,AIRCRAFT is a the manufacturer industrial component. Key specifications include special_features: ALUM ALLOY PER QQ-T-782 TEMPER T3;29.60 IN LG, 0.50 IN OD,0.059 THK IN. This part is cataloged in the U.S.

Government catalog under NSN 1680-00-898-1600, 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
C4B1645-21
NSN: 1680-00-898-1600
FSC: 1680 — Miscellaneous Aircraft Accessories and Components
CAGE: 71867 — DE HAVILLAND AIRCRAFT OF CANADA LIMITED (CAN)
SPECIFICATIONS
special_featuresALUM ALLOY PER QQ-T-782 TEMPER T3;29.60 IN LG, 0.50 IN OD,0.059 THK IN
NSN1680-00-898-1600
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TORQUE TUBE ASSEMBLY,AIRCRAFT TITLE COMPONENT PN C4B1645-21 MFR TORQUE TUBE ASSEMBLY,A
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESALUM ALLOY PER QQ-T-782 TEMPER T3;29.60 IN LG, 0.50 IN OD,0.059 THK IN
OTHER ITEMS IN FSC 1680 — Miscellaneous Aircraft Accessories and Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1680-00-001-1736 1680-00-003-3721 1680-00-009-3782 1680-00-009-6180 1680-00-475-0002 1680-00-696-6170 1680-00-867-7158 1680-00-885-0923
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is C4B1645-21?
C4B1645-21 is a TORQUE TUBE ASSEMBLY,AIRCRAFT.
What is the NSN for C4B1645-21?
C4B1645-21 is cataloged in the U.S. Government catalog under NSN 1680-00-898-1600. 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.