PartsTable
Technical Data Sheet
443123 ✓ 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. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-284-6648, 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
443123
NSN: 5331-01-284-6648
FSC: 5331 — O-RING
CAGE: 44MG9 — WEBASTO THERMO & COMFORT NORTH AMERICA, INC. DIV WEBASTO PRODUCT NORTH AMERICA, INC (USA)
SPECIFICATIONS
Part Number443123
NSN5331-01-284-6648
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 443123 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 6
148074Interchangeable
interchangeable cross-reference
interchangeable
81591Interchangeable
interchangeable cross-reference
interchangeable
P601Interchangeable
interchangeable cross-reference
interchangeable
105779Interchangeable
interchangeable cross-reference
interchangeable
105.779Interchangeable
Same NIIN cross-reference
interchangeable
9-515-100792Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 443123?
443123 is a O-RING.
What parts can replace 443123?
There are 6 known substitutes for 443123: 148074, 81591, P601 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 443123?
443123 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-284-6648. This indicates validated use in U.S. government and defense supply chains.
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