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AS28778-4 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

AS28778-4: O-RING.

The O-RING is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5331-00-805-2966, 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
AS28778-4
NSN: 5331-00-805-2966
FSC: 5331 — O-ring
CAGE: 1JYT1 — BLADE INDUSTRIAL PRODUCTS INC (USA)
SPECIFICATIONS
Part NumberAS28778-4
NSN5331-00-805-2966
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AS28778-4 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 7
AN-6290-4Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
D6-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS28778-4Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
36011-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
080-20465-004Reference document
Same NSN cross-reference
Reference document — Secondary reference
13037Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Shelf-life managedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS28778-4?
AS28778-4 is a O-RING.
What parts can replace AS28778-4?
There are 7 known substitutes for AS28778-4: AN-6290-4, D6-4, MS28778-4 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AS28778-4?
AS28778-4 is cataloged in the U.S. Government catalog under NSN 5331-00-805-2966. 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.