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Technical Data Sheet
PartsTable / O-RING / X1440
X1440 ✓ 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. Key specifications include material: ALUMINUM OR STEEL CASE, unit_type: MOUNTED, body_depth: 1.570 INCHES NOMINAL IN, current_type: AC, body_diameter: 0.688 INCHES NOMINAL IN, flange_height: 0.938 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-291-2374, 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
X1440
NSN: 5331-00-291-2374
FSC: 5331 — O-RING
CAGE: 92798 — THERMAL CERAMICS INC DBA THERMAL CERAMICS INC (USA)
SPECIFICATIONS
materialALUMINUM OR STEEL CASE
unit_typeMOUNTED
body_depth1.570 INCHES NOMINAL IN
current_typeAC
body_diameter0.688 INCHES NOMINAL IN
flange_height0.938 INCHES NOMINAL IN
marking_colorWHITE NUMERALS
mounting_typePANEL
movement_typeELECTRICAL
reset_featureNOT PROVIDED
terminal_typeSOLDER HOOK
indicator_typeDRUM REGISTER
NSN5331-00-291-2374
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: X1440 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
KEY FEATURES
•
CENTER HOLE DIAMETER: 0.296 INCHES MINIMUM AND 0.306 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER0.296 INCHES MINIMUM AND 0.306 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
72221Interchangeable
interchangeable cross-reference
interchangeable
2930006290949Interchangeable
interchangeable cross-reference
interchangeable
9346Interchangeable
interchangeable cross-reference
interchangeable
G25154Interchangeable
interchangeable cross-reference
interchangeable
X3531Interchangeable
interchangeable cross-reference
interchangeable
X3531LT2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is X1440?
X1440 is a O-RING.
What parts can replace X1440?
There are 19 known substitutes for X1440: 72221, 2930006290949, 9346 and 16 more. Substitute compatibility should be verified for your specific system.
Is X1440 still available?
X1440 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