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YM121850-51960 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

YM121850-51960: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include end_item_identification: GEAR HOUSING FOR NSN 2815-01-538-4257; ENGINE DIESEL, part_name_assigned_by_controlling_agency: O-RING, F.I. PUMP.

This part is cataloged in the U.S. Government catalog under NSN 5331-01-546-8510, 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
YM121850-51960
NSN: 5331-01-546-8510
FSC: 5331 — O-ring
CAGE: ZV961 — KOMATSU AUSTRALIA PTY LTD (AUS)
SPECIFICATIONS
end_item_identificationGEAR HOUSING FOR NSN 2815-01-538-4257; ENGINE DIESEL
part_name_assigned_by_controlling_agencyO-RING, F.I. PUMP
NSN5331-01-546-8510
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: YM121850-51960 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
TECHNICAL CHARACTERISTICS
PART NAME ASSIGNED BY CONTROLLING AGENCYO-RING, F.I. PUMP
END ITEM IDENTIFICATIONGEAR HOUSING FOR NSN 2815-01-538-4257; ENGINE DIESEL
OTHER ITEMS IN FSC 5331 — O-ring
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5331-00-001-1971 5331-00-001-1979 5331-00-001-3904 5331-00-001-3905 5331-00-001-3906 5331-00-001-3908 5331-00-001-3923 5331-00-001-3924
SUBSTITUTES & CROSS-REFERENCES 1
121850-51960Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is YM121850-51960?
YM121850-51960 is a O-RING.
What parts can replace YM121850-51960?
There is 1 known substitute for YM121850-51960: 121850-51960. Substitute compatibility should be verified for your specific system.
What is the NSN for YM121850-51960?
YM121850-51960 is cataloged in the U.S. Government catalog under NSN 5331-01-546-8510. 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.