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18-90B — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

18-90B: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include end_item_identification: DLA/GSA MANAGED ITEMS THAT CANNOT BE IDENTIFIED TO SPECIFIC ARMY WEAPONSWEAPONS SYSTEMS/END ITEMS. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-169-4570, 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
18-90B
NSN: 5331-01-169-4570
FSC: 5331 — O-ring
CAGE: 58366 — KIRBY MORGAN DIVE SYSTEMS INC (USA)
SPECIFICATIONS
end_item_identificationDLA/GSA MANAGED ITEMS THAT CANNOT BE IDENTIFIED TO SPECIFIC ARMY WEAPONSWEAPONS SYSTEMS/END ITEMS
NSN5331-01-169-4570
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 18-90B 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
TECHNICAL CHARACTERISTICS
END ITEM IDENTIFICATIONDLA/GSA MANAGED ITEMS THAT CANNOT BE IDENTIFIED TO SPECIFIC ARMY WEAPONSWEAPONS SYSTEMS/END ITEMS
SUBSTITUTES & CROSS-REFERENCES 2
5331PL0719933Reference document
Same NSN cross-reference
Reference document — Informative reference only
592-6318212Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 18-90B?
18-90B is a O-RING.
What parts can replace 18-90B?
There are 2 known substitutes for 18-90B: 5331PL0719933, 592-6318212. Substitute compatibility should be verified for your specific system.
What is the NSN for 18-90B?
18-90B is cataloged in the U.S. Government catalog under NSN 5331-01-169-4570. This indicates validated use in U.S. government and defense supply chains.
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