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Technical Data Sheet
PartsTable / O-RING / SOR4.359X.139-70NBR
SOR4.359X.139-70NBR ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The SOR4.359X.139-70NBR is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-579-7921, 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
SOR4.359X.139-70NBR
NSN: 5331-00-579-7921
FSC: 5331 — O-RING
CAGE: L8266 — STEEPLE INCORPORATED (CAN)
SPECIFICATIONS
Part NumberSOR4.359X.139-70NBR
NSN5331-00-579-7921
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SOR4.359X.139-70NBR 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
•
OUTSIDE DIAMETER: 4.637 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
ELONGATION PERCENTAGE: 160 MAXIMUM
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
TEMP RATING: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
•
CENTER HOLE DIAMETER: 4.344 INCHES MINIMUM AND 4.374 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER4.637 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
ELONGATION PERCENTAGE160 MAXIMUM
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TEMP RATING-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
CENTER HOLE DIAMETER4.344 INCHES MINIMUM AND 4.374 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
N304-7-23Interchangeable
interchangeable cross-reference
interchangeable
68547Interchangeable
interchangeable cross-reference
interchangeable
N0304 2-425Interchangeable
interchangeable cross-reference
interchangeable
N0304 2-245Interchangeable
interchangeable cross-reference
interchangeable
2-245 N304-75Interchangeable
interchangeable cross-reference
interchangeable
AN6227-88Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SOR4.359X.139-70NBR?
SOR4.359X.139-70NBR is a SOR4.359X.139-70NBR.
What parts can replace SOR4.359X.139-70NBR?
There are 18 known substitutes for SOR4.359X.139-70NBR: N304-7-23, 68547, N0304 2-425 and 15 more. Substitute compatibility should be verified for your specific system.
Is SOR4.359X.139-70NBR still available?
SOR4.359X.139-70NBR is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026