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221578 — RING,COVER,SEALING

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

221578: RING,COVER,SEALING.

The RING,COVER,SEALING is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: SYNETHIC RUBBER,4.502 IN. W BY 4.312 IN.

W IN. This part is cataloged in the U.S. Government catalog under NSN 1650-00-133-4409, 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
221578
NSN: 1650-00-133-4409
FSC: 1650 — Aircraft Hydraulic, Vacuum, and De-icing System Components
CAGE: 62983 — EATON AEROSPACE, LLC DBA JACKSON SOUTH (USA)
SPECIFICATIONS
general_characteristics_item_descriptionSYNETHIC RUBBER,4.502 IN. W BY 4.312 IN. W IN
NSN1650-00-133-4409
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,COVER,SEALING TITLE COMPONENT PN 221578 MFR RING,COVER,SEALING
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: SYNETHIC RUBBER,4.502 IN. W BY 4.312 IN. W IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSYNETHIC RUBBER,4.502 IN. W BY 4.312 IN. W IN
OTHER ITEMS IN FSC 1650 — Aircraft Hydraulic, Vacuum, and De-icing System Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1650-00-011-0886 1650-00-013-3761 1650-00-059-7742 1650-00-101-7836 1650-00-138-2779 1650-00-162-3907 1650-00-594-3500 1650-00-658-8056
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 221578?
221578 is a RING,COVER,SEALING.
What is the NSN for 221578?
221578 is cataloged in the U.S. Government catalog under NSN 1650-00-133-4409. 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.