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221921 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

221921: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include special_features: PART OF VALVE COVER BREATHER ASSEMBLY, end_item_identification: 3810-01-549-0465. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-606-7990, 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
221921
NSN: 5331-01-606-7990
FSC: 5331 — O-ring
CAGE: 0LRM3 — TEREX USA, LLC DBA TEREX USA, LLC (USA)
SPECIFICATIONS
special_featuresPART OF VALVE COVER BREATHER ASSEMBLY
end_item_identification3810-01-549-0465
NSN5331-01-606-7990
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 221921 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESPART OF VALVE COVER BREATHER ASSEMBLY
END ITEM IDENTIFICATION3810-01-549-0465
OTHER ITEMS IN FSC 5331 — O-ring
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5331-00-001-1971 5331-00-001-1979 5331-00-001-3904 5331-00-001-3905 5331-00-001-3906 5331-00-001-3908 5331-00-001-3923 5331-00-001-3924
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)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 221921?
221921 is a O-RING.
What is the NSN for 221921?
221921 is cataloged in the U.S. Government catalog under NSN 5331-01-606-7990. This indicates validated use in U.S. government and defense supply chains.
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