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Technical Data Sheet
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4J-0525 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4J-0525: O-RING.

The O-RING is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5331-00-922-6275, 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
4J-0525
NSN: 5331-00-922-6275
FSC: 5331 — O-ring
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
Part Number4J-0525
NSN5331-00-922-6275
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4J-0525 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 3
10012551Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
4J525Reference document
Same NSN cross-reference
Reference document — Secondary reference
5331PL2157955Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 4J-0525?
4J-0525 is a O-RING.
What parts can replace 4J-0525?
There are 3 known substitutes for 4J-0525: 10012551, 4J525, 5331PL2157955. Substitute compatibility should be verified for your specific system.
What is the NSN for 4J-0525?
4J-0525 is cataloged in the U.S. Government catalog under NSN 5331-00-922-6275. This indicates validated use in U.S. government and defense supply chains.
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