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N1851 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

N1851: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog 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 — Packing and Gasket Materials
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
SUBSTITUTES & CROSS-REFERENCES 9
43-421Reference document
Same NSN cross-reference
Reference document — Secondary reference
0S625Reference document
Same NSN cross-reference
Reference document — Secondary reference
450791Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
S8065Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
827952Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
50009LReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is N1851?
N1851 is a SEAL,PLAIN ENCASED.
What parts can replace N1851?
There are 9 known substitutes for N1851: 43-421, 0S625, 450791 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for N1851?
N1851 is cataloged in the U.S. Government catalog under NSN 5330-00-285-9441. This indicates validated use in U.S. government and defense supply chains.
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