PartsTable
Technical Data Sheet
PartsTable / O-RING / D7-345
D7-345 ✓ 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 BUTADIENE-ACRYLONITRILE CLASS NBR, outside_diameter: 4.357 INCHES MINIMUM AND 4.433 INCHES MAXIMUM IN, center_hole_diameter: 3.947 INCHES MINIMUM AND 4.003 INCHES MAXIMUM IN, cross-sectional_height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-179-0252, 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
D7-345
NSN: 5331-01-179-0252
FSC: 5331 — O-RING
CAGE: 01212 — FEDERAL-MOGUL CORP GOVERNMENT SALES DEPT (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter4.357 INCHES MINIMUM AND 4.433 INCHES MAXIMUM IN
center_hole_diameter3.947 INCHES MINIMUM AND 4.003 INCHES MAXIMUM IN
cross-sectional_height0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
NSN5331-01-179-0252
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: D7-345 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
•
OUTSIDE DIAMETER: 4.357 INCHES MINIMUM AND 4.433 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 3.947 INCHES MINIMUM AND 4.003 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER4.357 INCHES MINIMUM AND 4.433 INCHES MAXIMUM IN
CENTER HOLE DIAMETER3.947 INCHES MINIMUM AND 4.003 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
MS90064-6Interchangeable
interchangeable cross-reference
interchangeable
ABS 3302Interchangeable
interchangeable cross-reference
interchangeable
A-A-55549-14Interchangeable
interchangeable cross-reference
interchangeable
012-2101-345Interchangeable
interchangeable cross-reference
interchangeable
AN6227-48Interchangeable
Same NIIN cross-reference
interchangeable
A-345 SR8014-75Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D7-345?
D7-345 is a O-RING.
What parts can replace D7-345?
There are 12 known substitutes for D7-345: MS90064-6, ABS 3302, A-A-55549-14 and 9 more. Substitute compatibility should be verified for your specific system.
Is D7-345 still available?
D7-345 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