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Technical Data Sheet
PartsTable / COMPONENT / 7840-4-44
7840-4-44 ✓ 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 5330-00-154-8363, 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
7840-4-44
NSN: 5330-00-154-8363
FSC: 5330
CAGE: 97191 — DREDGER ELEVATOR CO INC (USA)
SPECIFICATIONS
Part Number7840-4-44
NSN5330-00-154-8363
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 7840-4-44 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 33
C449Interchangeable
interchangeable cross-reference
interchangeable
40166Interchangeable
interchangeable cross-reference
interchangeable
648690Interchangeable
interchangeable cross-reference
interchangeable
1142000-30Interchangeable
interchangeable cross-reference
interchangeable
4002-30Interchangeable
interchangeable cross-reference
interchangeable
RE49F172Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7840-4-44?
7840-4-44 is a SEAL,PLAIN ENCASED.
What parts can replace 7840-4-44?
There are 33 known substitutes for 7840-4-44: C449, 40166, 648690 and 30 more. Substitute compatibility should be verified for your specific system.
Is 7840-4-44 still available?
7840-4-44 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