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Technical Data Sheet
PartsTable / O-RING / 851209
851209 ✓ 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 CUP,OIL,LUBRICATING is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC, temp_rating: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF, hardness_rating: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM, outside_diameter: 13.525 INCHES NOMINAL IN, center_hole_diameter: 12.915 INCHES MINIMUM AND 13.035 INCHES MAXIMUM IN, elongation_percentage: 125 MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-161-4498, 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
851209
NSN: 5331-01-161-4498
FSC: 5331 — O-RING
CAGE: 19203 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV US ARMY RESEARCH, DEVELOPMENT AND ENGINEERING COMMAND ARMAMENT (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC
temp_rating-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
hardness_rating70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM
outside_diameter13.525 INCHES NOMINAL IN
center_hole_diameter12.915 INCHES MINIMUM AND 13.035 INCHES MAXIMUM IN
elongation_percentage125 MAXIMUM
cross-sectional_height0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
material_document_and_classificationMIL-P-83461/1 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5331-01-161-4498
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 851209 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: 13.525 INCHES NOMINAL IN
•
HARDNESS RATING: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-83461/1 MIL SPEC SINGLE MATERIAL RESPONSE
•
CENTER HOLE DIAMETER: 12.915 INCHES MINIMUM AND 13.035 INCHES MAXIMUM IN
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
TEMP RATING: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER13.525 INCHES NOMINAL IN
HARDNESS RATING70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-83461/1 MIL SPEC SINGLE MATERIAL RESPONSE
CENTER HOLE DIAMETER12.915 INCHES MINIMUM AND 13.035 INCHES MAXIMUM IN
ELONGATION PERCENTAGE125 MAXIMUM
TEMP RATING-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
CROSS-SECTIONAL HEIGHT0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
N90-84382Interchangeable
interchangeable cross-reference
interchangeable
2-455 N304-75Interchangeable
interchangeable cross-reference
interchangeable
PRP568-455-4067-70Interchangeable
interchangeable cross-reference
interchangeable
M83248/1-455Interchangeable
interchangeable cross-reference
interchangeable
11-455Interchangeable
interchangeable cross-reference
interchangeable
851209Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 851209?
851209 is a CUP,OIL,LUBRICATING.
What parts can replace 851209?
There are 20 known substitutes for 851209: N90-84382, 2-455 N304-75, PRP568-455-4067-70 and 17 more. Substitute compatibility should be verified for your specific system.
Is 851209 still available?
851209 is currently cancelled.
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Last verified: July 2026