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Technical Data Sheet
MIL-R-83485 ✓ 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 FLUOROCARBON CLASS FPM, hardness_rating: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM, special_features: WEAPONS SYSTEM ESSENTIAL, center_hole_diameter: 0.354 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN, criticality_code_justification: FEAT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-211-7498, 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
MIL-R-83485
NSN: 5331-01-211-7498
FSC: 5331 — O-RING
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialRUBBER FLUOROCARBON CLASS FPM
hardness_rating70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM
special_featuresWEAPONS SYSTEM ESSENTIAL
center_hole_diameter0.354 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
criticality_code_justificationFEAT
material_document_and_classificationMIL-R-83485 TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5331-01-211-7498
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MIL-R-83485 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: 0.678 INCHES MINIMUM AND 0.704 INCHES MAXIMUM IN
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
HARDNESS RATING: 75.0 SHORE DUROMETER A NOMINAL
TEMP RATING: -40.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
CENTER HOLE DIAMETER: 0.544 INCHES MINIMUM AND 0.558 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.678 INCHES MINIMUM AND 0.704 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROCARBON CLASS FPM
HARDNESS RATING75.0 SHORE DUROMETER A NOMINAL
TEMP RATING-40.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
CENTER HOLE DIAMETER0.544 INCHES MINIMUM AND 0.558 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
M83485/1-015Interchangeable
interchangeable cross-reference
interchangeable
ST1946-015Interchangeable
interchangeable cross-reference
interchangeable
10444076Interchangeable
Same NIIN cross-reference
interchangeable
V0835 2-015Interchangeable
Same NIIN cross-reference
interchangeable
AMC-R-83485Interchangeable
Same NIIN cross-reference
interchangeable
2-015 V0835-75Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-R-83485?
MIL-R-83485 is a O-RING.
What parts can replace MIL-R-83485?
There are 8 known substitutes for MIL-R-83485: M83485/1-015, ST1946-015, 10444076 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-R-83485?
MIL-R-83485 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-211-7498. This indicates validated use in U.S. government and defense supply chains.
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