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6566-40-991-0101 — ROD,PISTON,HYDRAULIC ACCUMULATOR

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

6566-40-991-0101: ROD,PISTON,HYDRAULIC ACCUMULATOR.

ROD,PISTON,HYDRAULIC ACCUMULATOR. Key specifications include end_item_identification: CH53E HELO. This part is cataloged in the U.S.

Government catalog under NSN 1650-01-129-3911, 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
6566-40-991-0101
NSN: 1650-01-129-3911
NIINs: 011293911, 013480990
FSC: 1650 — Aircraft Hydraulic, Vacuum, and De-icing System Components
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
end_item_identificationCH53E HELO
NSN1650-01-129-3911
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available ROD,PISTON,HYDRAULIC ACCUMULATOR TITLE COMPONENT PN 6566-40-991-0101 MFR ROD,PISTON,HYDRAULIC A
KEY FEATURES
•
BLEEDER OPENING: INCLUDED
•
OVERALL DIAMETER: 6.760 INCHES MINIMUM AND 6.800 INCHES MAXIMUM IN
•
SHAPE: CYLINDRICAL
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: AS DIFFERENTIATED BY THE SOURCE CONTROL DWG NUMBER
TECHNICAL CHARACTERISTICS
BLEEDER OPENINGINCLUDED
OVERALL DIAMETER6.760 INCHES MINIMUM AND 6.800 INCHES MAXIMUM IN
SHAPECYLINDRICAL
OVERALL LENGTH25.500 INCHES MINIMUM AND 26.500 INCHES MAXIMUM IN
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSAS DIFFERENTIATED BY THE SOURCE CONTROL DWG NUMBER
SUBSTITUTES & CROSS-REFERENCES 1
898225Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 6566-40-991-0101?
6566-40-991-0101 is a ROD,PISTON,HYDRAULIC ACCUMULATOR.
What parts can replace 6566-40-991-0101?
There is 1 known substitute for 6566-40-991-0101: 898225. Substitute compatibility should be verified for your specific system.
What is the NSN for 6566-40-991-0101?
6566-40-991-0101 is cataloged in the U.S. Government catalog under NSN 1650-01-129-3911. 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.