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N1851 ✓ 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 SEAL,PLAIN ENCASED is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-285-9441, 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
N1851
NSN: 5330-00-285-9441
FSC: 5330
CAGE: 81010 — DRESSER/MARION DIV (USA)
SPECIFICATIONS
Part NumberN1851
NSN5330-00-285-9441
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: N1851 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
WW-4342-1Interchangeable
interchangeable cross-reference
interchangeable
335H50Interchangeable
interchangeable cross-reference
interchangeable
DM51Interchangeable
interchangeable cross-reference
interchangeable
6180Interchangeable
interchangeable cross-reference
interchangeable
14U1007PCDA6180Interchangeable
interchangeable cross-reference
interchangeable
N910P25B6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is N1851?
N1851 is a SEAL,PLAIN ENCASED.
What parts can replace N1851?
There are 24 known substitutes for N1851: WW-4342-1, 335H50, DM51 and 21 more. Substitute compatibility should be verified for your specific system.
Is N1851 still available?
N1851 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026