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Technical Data Sheet
PartsTable / COMPONENT / 44668B4
44668B4 ✓ 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 PACKING ASSEMBLY is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-633-5092, 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
44668B4
NSN: 5330-00-633-5092
FSC: 5330
CAGE: 00742 — AIR PRODUCTS & CHEMICALS, INC (USA)
SPECIFICATIONS
Part Number44668B4
NSN5330-00-633-5092
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 44668B4 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 5
3-680-03-0004CPInterchangeable
interchangeable cross-reference
interchangeable
3-680-03-0004Interchangeable
interchangeable cross-reference
interchangeable
05943CPInterchangeable
interchangeable cross-reference
interchangeable
H3-680-03-0004Interchangeable
Same NIIN cross-reference
interchangeable
H4-617-70-0004Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 44668B4?
44668B4 is a PACKING ASSEMBLY.
What parts can replace 44668B4?
There are 5 known substitutes for 44668B4: 3-680-03-0004CP, 3-680-03-0004, 05943CP and 2 more. Substitute compatibility should be verified for your specific system.
Is 44668B4 still available?
44668B4 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