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0634 303 306 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

0634 303 306: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include center_hole_diameter: 91.670 MILLIMETERS NOMINAL MM, cross-sectional_height: 3.530 MILLIMETERS NOMINAL MM, end_item_identification: GEAR, MARINE. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-648-0658, 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
0634 303 306
NSN: 5331-01-648-0658
FSC: 5331 — O-ring
CAGE: 1EMK1 — ZF MARINE PROPULSION SYSTEMS MIRAMAR LLC (USA)
SPECIFICATIONS
center_hole_diameter91.670 MILLIMETERS NOMINAL MM
cross-sectional_height3.530 MILLIMETERS NOMINAL MM
end_item_identificationGEAR, MARINE
NSN5331-01-648-0658
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 0634 303 306 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: 3.530 MILLIMETERS NOMINAL MM
•
CENTER HOLE DIAMETER: 91.670 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT3.530 MILLIMETERS NOMINAL MM
CENTER HOLE DIAMETER91.670 MILLIMETERS NOMINAL MM
END ITEM IDENTIFICATIONGEAR, MARINE
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 0634 303 306?
0634 303 306 is a O-RING.
What is the NSN for 0634 303 306?
0634 303 306 is cataloged in the U.S. Government catalog under NSN 5331-01-648-0658. 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.