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521896 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

521896: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include end_item_identification: LCU. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-989-8634, 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
521896
NSN: 5330-00-989-8634
NIINs: 009898634, 014289105
FSC: 5330 — Packing and Gasket Materials
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
end_item_identificationLCU
NSN5330-00-989-8634
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 521896 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FSC APPLICATION DATA: AIRCRAFT AIRCONDITIONING SYSTEM
•
CROSS-SECTIONAL THICKNESS: 0.060 INCHES NOMINAL IN
•
HARDNESS RATING: 60.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM OVERALL
•
SIDE RADIUS FROM GASKET CENTER: 1.960 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE CORNER INVERTED RADIUS: 0.240 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAAIRCRAFT AIRCONDITIONING SYSTEM
CROSS-SECTIONAL THICKNESS0.060 INCHES NOMINAL IN
HARDNESS RATING60.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM OVERALL
SIDE RADIUS FROM GASKET CENTER1.960 INCHES NOMINAL IN
STYLE DESIGNATORNON-CIRCULAR
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OVERALL WIDTH4.000 INCHES NOMINAL IN
OUTSIDE CORNER INVERTED RADIUS0.240 INCHES NOMINAL IN
APERTURE DIAMETER3.200 INCHES NOMINAL IN
BOLT HOLE QUANTITY4
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 521896?
521896 is a GASKET.
What is the NSN for 521896?
521896 is cataloged in the U.S. Government catalog under NSN 5330-00-989-8634. 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.