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265-7808 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

265-7808: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, special_features: OD IS 139.3 MM MM, center_hole_diameter: 135.8 MILLIMETERS NOMINAL MM, cross-sectional_height: 1.8 MILLIMETERS NOMINAL MM, end_item_identification: GENERATOR SET,SHIPDIESEL NO. 1 & NO.

2. This part is cataloged in the U.S. Government catalog under NSN 5331-01-535-4079, 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
265-7808
NSN: 5331-01-535-4079
FSC: 5331 — O-ring
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
special_featuresOD IS 139.3 MM MM
center_hole_diameter135.8 MILLIMETERS NOMINAL MM
cross-sectional_height1.8 MILLIMETERS NOMINAL MM
end_item_identificationGENERATOR SET,SHIPDIESEL NO. 1 & NO. 2
NSN5331-01-535-4079
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 265-7808 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: 1.8 MILLIMETERS NOMINAL MM
•
CENTER HOLE DIAMETER: 135.8 MILLIMETERS NOMINAL MM
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT1.8 MILLIMETERS NOMINAL MM
SPECIAL FEATURESOD IS 139.3 MM MM
CENTER HOLE DIAMETER135.8 MILLIMETERS NOMINAL MM
END ITEM IDENTIFICATIONGENERATOR SET,SHIPDIESEL NO. 1 & NO. 2
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 265-7808?
265-7808 is a O-RING.
What is the NSN for 265-7808?
265-7808 is cataloged in the U.S. Government catalog under NSN 5331-01-535-4079. 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.