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Technical Data Sheet
PartsTable / O-RING / 3-902 NBR
3-902 NBR ✓ 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 color: BLACK, material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, center_hole_diameter: 0.240 INCHES NOMINAL IN, end_item_identification: 2590-01-626-9881, part_name_assigned_by_controlling_agency: O-RING. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-022-9018, 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
3-902 NBR
NSN: 5331-01-022-9018
FSC: 5331 — O-RING
CAGE: 02697 — PARKER-HANNIFIN CORP DIV O-RING DIVISION (USA)
SPECIFICATIONS
colorBLACK
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
center_hole_diameter0.240 INCHES NOMINAL IN
end_item_identification2590-01-626-9881
part_name_assigned_by_controlling_agencyO-RING
NSN5331-01-022-9018
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3-902 NBR 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: 0.356 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN
•
HARDNESS RATING: 70.0 SHORE DUROMETER A NOMINAL
•
CROSS-SECTIONAL HEIGHT: 0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
•
TEMP RATING: -65.0 FAHRENHEIT AND 450.0 FAHRENHEIT DEGF
•
MATERIAL: RUBBER SILICONE CLASS Q
•
CENTER HOLE DIAMETER: 0.239 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.356 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN
HARDNESS RATING70.0 SHORE DUROMETER A NOMINAL
CROSS-SECTIONAL HEIGHT0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
TEMP RATING-65.0 FAHRENHEIT AND 450.0 FAHRENHEIT DEGF
MATERIALRUBBER SILICONE CLASS Q
CENTER HOLE DIAMETER0.239 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
2052169Interchangeable
interchangeable cross-reference
interchangeable
647169-000Interchangeable
interchangeable cross-reference
interchangeable
3721Interchangeable
interchangeable cross-reference
interchangeable
3902Interchangeable
interchangeable cross-reference
interchangeable
7346846-03Interchangeable
interchangeable cross-reference
interchangeable
AS568-902ZZR765CL2BGR70Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3-902 NBR?
3-902 NBR is a O-RING.
What parts can replace 3-902 NBR?
There are 12 known substitutes for 3-902 NBR: 2052169, 647169-000, 3721 and 9 more. Substitute compatibility should be verified for your specific system.
Is 3-902 NBR still available?
3-902 NBR 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