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11EK78 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

11EK78: O-RING.

The O-RING is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5331-01-154-3997, 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
11EK78
NSN: 5331-01-154-3997
FSC: 5331 — O-ring
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
Part Number11EK78
NSN5331-01-154-3997
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 11EK78 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 2
BCPNB1161017Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
10003706Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedAcquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 11EK78?
11EK78 is a O-RING.
What parts can replace 11EK78?
There are 2 known substitutes for 11EK78: BCPNB1161017, 10003706. Substitute compatibility should be verified for your specific system.
What is the NSN for 11EK78?
11EK78 is cataloged in the U.S. Government catalog under NSN 5331-01-154-3997. This indicates validated use in U.S. government and defense supply chains.
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