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Technical Data Sheet
PartsTable / O-RING / AN123902
AN123902 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, hardness_rating: 70.0 SHORE DUROMETER A NOMINAL OVERALL, peripheral_diameter: 4.262 INCHES NOMINAL IN, center_hole_diameter: 3.960 INCHES NOMINAL IN, elongation_percentage: 150 MAXIMUM, cross-sectional_height: 0.150 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-290-9386, 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
AN123902
NSN: 5331-00-290-9386
FSC: 5331 — O-RING
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
hardness_rating70.0 SHORE DUROMETER A NOMINAL OVERALL
peripheral_diameter4.262 INCHES NOMINAL IN
center_hole_diameter3.960 INCHES NOMINAL IN
elongation_percentage150 MAXIMUM
cross-sectional_height0.150 INCHES NOMINAL IN
cross-sectional_shape_styleO-RING
NSN5331-00-290-9386
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AN123902 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: 4.262 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
ELONGATION PERCENTAGE: 150 MAXIMUM
•
HARDNESS RATING: 70.0 SHORE DUROMETER A NOMINAL
•
CENTER HOLE DIAMETER: 3.969 INCHES MINIMUM AND 3.999 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER4.262 INCHES NOMINAL IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
ELONGATION PERCENTAGE150 MAXIMUM
HARDNESS RATING70.0 SHORE DUROMETER A NOMINAL
CENTER HOLE DIAMETER3.969 INCHES MINIMUM AND 3.999 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
NO180 2-242Interchangeable
interchangeable cross-reference
interchangeable
AN123902Interchangeable
interchangeable cross-reference
interchangeable
AS3570-242Interchangeable
Same NIIN cross-reference
interchangeable
SAE-AS3570Interchangeable
Same NIIN cross-reference
interchangeable
A1633-13Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN123902?
AN123902 is a O-RING.
What parts can replace AN123902?
There are 5 known substitutes for AN123902: NO180 2-242, AN123902, AS3570-242 and 2 more. Substitute compatibility should be verified for your specific system.
Is AN123902 still available?
AN123902 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