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53-820004-3 — BLOCK,RETAINING

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

53-820004-3: BLOCK,RETAINING.

The BLOCK,RETAINING is a the manufacturer industrial component. Key specifications include fsc_application_data: SEAT,AIRCRAFT EJECTION, end_item_identification: PART OF DROGUE PARACHUTE CONTAINER ASSEMBLY,F-4 AIRCRAFT. This part is cataloged in the U.S.

Government catalog under NSN 1680-01-146-5235, 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
53-820004-3
NSN: 1680-01-146-5235
FSC: 1680 — Miscellaneous Aircraft Accessories and Components
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
fsc_application_dataSEAT,AIRCRAFT EJECTION
end_item_identificationPART OF DROGUE PARACHUTE CONTAINER ASSEMBLY,F-4 AIRCRAFT
NSN1680-01-146-5235
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BLOCK,RETAINING TITLE COMPONENT PN 53-820004-3 MFR BLOCK,RETAINING
KEY FEATURES
•
FSC APPLICATION DATA: SEAT,AIRCRAFT EJECTION
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATASEAT,AIRCRAFT EJECTION
END ITEM IDENTIFICATIONPART OF DROGUE PARACHUTE CONTAINER ASSEMBLY,F-4 AIRCRAFT
OTHER ITEMS IN FSC 1680 — Miscellaneous Aircraft Accessories and Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1680-00-000-0144 1680-00-001-1401 1680-00-001-1402 1680-00-001-1403 1680-00-001-1404 1680-00-001-1730 1680-00-001-1731 1680-00-001-1736
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 — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 53-820004-3?
53-820004-3 is a BLOCK,RETAINING.
What is the NSN for 53-820004-3?
53-820004-3 is cataloged in the U.S. Government catalog under NSN 1680-01-146-5235. 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.