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Technical Data Sheet
PartsTable / O-RING / D03818
D03818 ✓ 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: RUBBER SYNTHETIC, outside_diameter: 0.274 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN, center_hole_diameter: 0.109 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN, cross-sectional_height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-107-4956, 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
D03818
NSN: 5331-01-107-4956
FSC: 5331 — O-RING
CAGE: 98991 — WORCESTER CONTROLS CORP P O BOX 2609 COOKEVILLE TN 385022609 (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC
outside_diameter0.274 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN
center_hole_diameter0.109 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
NSN5331-01-107-4956
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: D03818 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
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.274 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.109 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.274 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.109 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
10814Interchangeable
interchangeable cross-reference
interchangeable
11739-1REVDInterchangeable
interchangeable cross-reference
interchangeable
S6624-1CHANGE1Interchangeable
interchangeable cross-reference
interchangeable
15121Interchangeable
interchangeable cross-reference
interchangeable
B94.9 1-72 UNF HS G H1Interchangeable
interchangeable cross-reference
interchangeable
W300148AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D03818?
D03818 is a O-RING.
What parts can replace D03818?
There are 22 known substitutes for D03818: 10814, 11739-1REVD, S6624-1CHANGE1 and 19 more. Substitute compatibility should be verified for your specific system.
Is D03818 still available?
D03818 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