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AS3581-390 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

AS3581-390: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER FLUOROCARBON CLASS FPM, center_hole_diameter: 20.860 INCHES MINIMUM AND 21.050 INCHES MAXIMUM IN, cross-sectional_height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN, end_item_identification: MK 19 MOD 0 TURBINE PUMP EJN SYSTEM, specification/standard_data: 0U583-AS3581 NATIONAL STD/SPEC. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-672-9063, 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
AS3581-390
NSN: 5331-01-672-9063
FSC: 5331 — O-ring
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialRUBBER FLUOROCARBON CLASS FPM
center_hole_diameter20.860 INCHES MINIMUM AND 21.050 INCHES MAXIMUM IN
cross-sectional_height0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
end_item_identificationMK 19 MOD 0 TURBINE PUMP EJN SYSTEM
specification/standard_data0U583-AS3581 NATIONAL STD/SPEC
NSN5331-01-672-9063
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AS3581-390 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: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
•
SPECIFICATION/STANDARD DATA: 0U583-AS3581 NATIONAL STD/SPEC
•
CENTER HOLE DIAMETER: 20.860 INCHES MINIMUM AND 21.050 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
SPECIFICATION/STANDARD DATA0U583-AS3581 NATIONAL STD/SPEC
CENTER HOLE DIAMETER20.860 INCHES MINIMUM AND 21.050 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONMK 19 MOD 0 TURBINE PUMP EJN SYSTEM
MATERIALRUBBER FLUOROCARBON CLASS FPM
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 1
SAE-AS3581Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS3581-390?
AS3581-390 is a O-RING.
What parts can replace AS3581-390?
There is 1 known substitute for AS3581-390: SAE-AS3581. Substitute compatibility should be verified for your specific system.
What is the NSN for AS3581-390?
AS3581-390 is cataloged in the U.S. Government catalog under NSN 5331-01-672-9063. This indicates validated use in U.S. government and defense supply chains.
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