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4256494 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4256494: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE NITRILE, special_features: DUROMETER:90, center_hole_diameter: 1.300 INCHES NOMINAL IN, cross-sectional_height: 0.140 INCHES NOMINAL IN, end_item_identification: 4210-01-622-0440; TRUCK, FIRE FIGHTING, part_name_assigned_by_controlling_agency: ORING 1.30X.139, NBR, 90. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-663-1443, 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
4256494
NSN: 5331-01-663-1443
FSC: 5331 — O-ring
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE NITRILE
special_featuresDUROMETER:90
center_hole_diameter1.300 INCHES NOMINAL IN
cross-sectional_height0.140 INCHES NOMINAL IN
end_item_identification4210-01-622-0440; TRUCK, FIRE FIGHTING
part_name_assigned_by_controlling_agencyORING 1.30X.139, NBR, 90
NSN5331-01-663-1443
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4256494 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
KEY FEATURES
•
CROSS-SECTIONAL HEIGHT: 0.140 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 1.300 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE NITRILE
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.140 INCHES NOMINAL IN
SPECIAL FEATURESDUROMETER:90
CENTER HOLE DIAMETER1.300 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYORING 1.30X.139, NBR, 90
END ITEM IDENTIFICATION4210-01-622-0440; TRUCK, FIRE FIGHTING
MATERIALRUBBER BUTADIENE NITRILE
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4256494?
4256494 is a O-RING.
What is the NSN for 4256494?
4256494 is cataloged in the U.S. Government catalog under NSN 5331-01-663-1443. 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.