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Technical Data Sheet
PartsTable / COMPONENT / DC3343
DC3343 ✓ 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 PLUG,EXPANSION is a the manufacturer industrial component. Key specifications include radius: 1.375 INCHES NOMINAL IN, material: STEEL, outside_diameter: 1.122 INCHES MINIMUM AND 1.128 INCHES MAXIMUM IN, style_designator: CONCAVE, material_thickness: 0.083 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-050-1600, 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
DC3343
NSN: 5340-00-050-1600
FSC: 5340
CAGE: 35311 — AMERICAN STANDARD INC WESTINGHOUSE AIR BRAKE CO DIV (USA)
SPECIFICATIONS
radius1.375 INCHES NOMINAL IN
materialSTEEL
outside_diameter1.122 INCHES MINIMUM AND 1.128 INCHES MAXIMUM IN
style_designatorCONCAVE
material_thickness0.083 INCHES NOMINAL IN
NSN5340-00-050-1600
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: DC3343 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
•
MATERIAL: STEEL
•
OUTSIDE DIAMETER: 1.122 INCHES MINIMUM AND 1.128 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CONCAVE
•
MATERIAL THICKNESS: 0.083 INCHES NOMINAL IN
•
RADIUS: 1.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL
OUTSIDE DIAMETER1.122 INCHES MINIMUM AND 1.128 INCHES MAXIMUM IN
STYLE DESIGNATORCONCAVE
MATERIAL THICKNESS0.083 INCHES NOMINAL IN
RADIUS1.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
106517Upgraded Successor
successor cross-reference
successor
202402Upgraded Successor
successor cross-reference
successor
1264Upgraded Successor
successor cross-reference
successor
1264PUpgraded Successor
successor cross-reference
successor
M1264PUpgraded Successor
successor cross-reference
successor
A-A-52420-15Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is DC3343?
DC3343 is a PLUG,EXPANSION.
What parts can replace DC3343?
There are 27 known substitutes for DC3343: 106517, 202402, 1264 and 24 more. Substitute compatibility should be verified for your specific system.
Is DC3343 still available?
DC3343 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