PartsTable
Technical Data Sheet
PartsTable / O-RING / 3-4S418-6
3-4S418-6 ✓ 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 SILICONE CLASS Q, temp_rating: -51.11 CELSIUS AND 232.22 CELSIUS DEGC, hardness_rating: 55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM, special_features: AMS 3303 SILICONE RUBBER, 60 DUROMETER. RUST IN COLOR.

TEMPERATURE RATING: -51.11 C TO 232.22 C (-60 F TO 450 F)., center_hole_diameter: 8.79 MILLIMETERS MINIMUM AND 9.05 MILLIMETERS MAXIMUM MM, cross-sectional_height: 1.75 MILLIMETERS MINIMUM AND 1.91 MILLIMETERS MAXIMUM MM. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-274-7854, 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
3-4S418-6
NSN: 5331-00-274-7854
FSC: 5331 — O-RING
CAGE: 02697 — PARKER-HANNIFIN CORP DIV O-RING DIVISION (USA)
SPECIFICATIONS
materialRUBBER SILICONE CLASS Q
temp_rating-51.11 CELSIUS AND 232.22 CELSIUS DEGC
hardness_rating55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM
special_featuresAMS 3303 SILICONE RUBBER, 60 DUROMETER. RUST IN COLOR. TEMPERATURE RATING: -51.11 C TO 232.22 C (-60 F TO 450 F).
center_hole_diameter8.79 MILLIMETERS MINIMUM AND 9.05 MILLIMETERS MAXIMUM MM
cross-sectional_height1.75 MILLIMETERS MINIMUM AND 1.91 MILLIMETERS MAXIMUM MM
material_document_and_classificationAMS3303 INTERNATIONAL STD/SPEC ALL MATERIAL RESPONSES
part_name_assigned_by_controlling_agencyFLUOROSILICONE 60 DUROMETER O-RING, RUST
NSN5331-00-274-7854
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3-4S418-6 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
•
TEMP RATING: -60.0 FAHRENHEIT AND 450.0 FAHRENHEIT DEGF
•
OUTSIDE DIAMETER: 0.484 INCHES MINIMUM AND 0.506 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.346 INCHES MINIMUM AND 0.356 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.069 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
•
HARDNESS RATING: 60.0 SHORE DUROMETER A NOMINAL
•
MATERIAL: RUBBER SILICONE CLASS Q
TECHNICAL CHARACTERISTICS (FLIS)
TEMP RATING-60.0 FAHRENHEIT AND 450.0 FAHRENHEIT DEGF
OUTSIDE DIAMETER0.484 INCHES MINIMUM AND 0.506 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.346 INCHES MINIMUM AND 0.356 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.069 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
HARDNESS RATING60.0 SHORE DUROMETER A NOMINAL
MATERIALRUBBER SILICONE CLASS Q
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
X25C85Interchangeable
interchangeable cross-reference
interchangeable
B-4TH1166Interchangeable
interchangeable cross-reference
interchangeable
904-11506Interchangeable
interchangeable cross-reference
interchangeable
9-91-47Interchangeable
interchangeable cross-reference
interchangeable
3-904S613-60Interchangeable
interchangeable cross-reference
interchangeable
S0613 3-904Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3-4S418-6?
3-4S418-6 is a O-RING.
What parts can replace 3-4S418-6?
There are 10 known substitutes for 3-4S418-6: X25C85, B-4TH1166, 904-11506 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3-4S418-6?
3-4S418-6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-274-7854. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026