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304386 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

304386: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, center_hole_diameter: 85.0 MILLIMETERS NOMINAL MM, cross-sectional_height: 10.0 MILLIMETERS NOMINAL MM, end_item_identification: DUPLEX FILTER. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-553-1361, 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
304386
NSN: 5331-01-553-1361
FSC: 5331 — O-ring
CAGE: 095B7 — ATICO-INTERNORMEN (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
center_hole_diameter85.0 MILLIMETERS NOMINAL MM
cross-sectional_height10.0 MILLIMETERS NOMINAL MM
end_item_identificationDUPLEX FILTER
NSN5331-01-553-1361
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 304386 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: 10.0 MILLIMETERS NOMINAL MM
•
CENTER HOLE DIAMETER: 85.0 MILLIMETERS NOMINAL MM
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT10.0 MILLIMETERS NOMINAL MM
CENTER HOLE DIAMETER85.0 MILLIMETERS NOMINAL MM
END ITEM IDENTIFICATIONDUPLEX FILTER
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
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
831666Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 304386?
304386 is a O-RING.
What parts can replace 304386?
There is 1 known substitute for 304386: 831666. Substitute compatibility should be verified for your specific system.
What is the NSN for 304386?
304386 is cataloged in the U.S. Government catalog under NSN 5331-01-553-1361. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.