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Technical Data Sheet
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2M-9780 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2M-9780: O-RING.

The O-RING is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5331-00-939-0687, 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
2M-9780
NSN: 5331-00-939-0687
FSC: 5331 — O-ring
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
Part Number2M-9780
NSN5331-00-939-0687
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2M-9780 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
A00539Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2000114Reference document
Same NSN cross-reference
Reference document — Secondary reference
449-7302Reference document
Same NSN cross-reference
Reference document — Informative reference only
5CA840Reference 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 2M-9780?
2M-9780 is a O-RING.
What parts can replace 2M-9780?
There are 4 known substitutes for 2M-9780: A00539, 2000114, 449-7302 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2M-9780?
2M-9780 is cataloged in the U.S. Government catalog under NSN 5331-00-939-0687. This indicates validated use in U.S. government and defense supply chains.
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