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Technical Data Sheet
PartsTable / O-RING / 304,39X3,53F641A
304,39X3,53F641A ✓ 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 304,39X3,53F641A is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-579-6518, 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
304,39X3,53F641A
NSN: 5331-00-579-6518
FSC: 5331 — O-RING
CAGE: F0229 — LE JOINT FRANCAIS (FRA)
SPECIFICATIONS
Part Number304,39X3,53F641A
NSN5331-00-579-6518
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 304,39X3,53F641A 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
•
CENTER HOLE DIAMETER: 11.954 INCHES MINIMUM AND 12.014 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
HARDNESS RATING: 65.0 SHORE DUROMETER A NOMINAL
•
OUTSIDE DIAMETER: 12.189 INCHES MINIMUM AND 12.335 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
TEMP RATING: -70.0 FAHRENHEIT AND 180.0 FAHRENHEIT DEGF
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER11.954 INCHES MINIMUM AND 12.014 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
HARDNESS RATING65.0 SHORE DUROMETER A NOMINAL
OUTSIDE DIAMETER12.189 INCHES MINIMUM AND 12.335 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
TEMP RATING-70.0 FAHRENHEIT AND 180.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
G22-78Interchangeable
interchangeable cross-reference
interchangeable
22-78Interchangeable
interchangeable cross-reference
interchangeable
9448731030Interchangeable
interchangeable cross-reference
interchangeable
MS35489-27Interchangeable
interchangeable cross-reference
interchangeable
18A3732Interchangeable
interchangeable cross-reference
interchangeable
LP320Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 304,39X3,53F641A?
304,39X3,53F641A is a 304,39X3,53F641A.
What parts can replace 304,39X3,53F641A?
There are 24 known substitutes for 304,39X3,53F641A: G22-78, 22-78, 9448731030 and 21 more. Substitute compatibility should be verified for your specific system.
Is 304,39X3,53F641A still available?
304,39X3,53F641A 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