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9Y6401 — FLANGE,PIPE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

9Y6401: FLANGE,PIPE.

The FLANGE,PIPE is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5331-00-004-5338, 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
9Y6401
NSN: 5331-00-004-5338
NIINs: 000045338, 013497828, 013497962, 014490144, 014492453, 014496814
FSC: 5331 — O-ring
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
Part Number9Y6401
NSN5331-00-004-5338
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 9Y6401 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
SUBSTITUTES & CROSS-REFERENCES 4
ON65222.35.63Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
6V0357Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
2-217N219-70Reference document
Same NSN cross-reference
Reference document — Secondary reference
6V357Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Shelf-life managedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 9Y6401?
9Y6401 is a FLANGE,PIPE.
What parts can replace 9Y6401?
There are 4 known substitutes for 9Y6401: ON65222.35.63, 6V0357, 2-217N219-70 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 9Y6401?
9Y6401 is cataloged in the U.S. Government catalog under NSN 5331-00-004-5338. 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.