PartsTable / COMPONENT / C3978
C3978
✓ 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 GASKET is a the manufacturer industrial component. Key specifications include material: CORK OVERALL, hole_diameter: 0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, outside_diameter: 4.562 INCHES NOMINAL IN, aperture_diameter: 3.375 INCHES NOMINAL IN, bolt_circle_diameter: 3.938 INCHES NOMINAL IN, cross-sectional_thickness: 0.094 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-147-9680, 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
C3978
NSN: 5330-00-147-9680 FSC: 5330 CAGE: 0B0B1 — MAHLE AFTERMARKET INC. DBA AE CLEVITE INC (USA)
SPECIFICATIONS
material CORK OVERALL hole_diameter 0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN outside_diameter 4.562 INCHES NOMINAL IN aperture_diameter 3.375 INCHES NOMINAL IN bolt_circle_diameter 3.938 INCHES NOMINAL IN cross-sectional_thickness 0.094 INCHES NOMINAL IN cross-sectional_shape_style SOLID SINGLE OR COMPOSITION NSN 5330-00-147-9680
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION
ID: —
CROSS-SECTION
CS: —
SPECIFICATION
Material: —
Durometer: —
Temp: —
PN: C3978
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
• HOLE DIAMETER: 0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
• BOLT CIRCLE DIAMETER: 3.938 INCHES NOMINAL IN
• CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
• APERTURE DIAMETER: 3.375 INCHES NOMINAL IN
• OUTSIDE DIAMETER: 4.562 INCHES NOMINAL IN
• CROSS-SECTIONAL THICKNESS: 0.094 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER 0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN BOLT CIRCLE DIAMETER 3.938 INCHES NOMINAL IN CROSS-SECTIONAL SHAPE STYLE SOLID SINGLE OR COMPOSITION MATERIAL CORK OVERALL APERTURE DIAMETER 3.375 INCHES NOMINAL IN OUTSIDE DIAMETER 4.562 INCHES NOMINAL IN CROSS-SECTIONAL THICKNESS 0.094 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
33104 Interchangeable interchangeable cross-reference
interchangeable
NF10324 Interchangeable interchangeable cross-reference
interchangeable
EA585 Interchangeable interchangeable cross-reference
interchangeable
11764 Interchangeable interchangeable cross-reference
interchangeable
10077 Interchangeable interchangeable cross-reference
interchangeable
62828 Interchangeable interchangeable cross-reference
interchangeable
LIFECYCLE
Status CANCELLED
Availability —
RoHS Compliant EAR99 Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C3978?
C3978 is a GASKET.
What parts can replace C3978?
There are 19 known substitutes for C3978: 33104, NF10324, EA585 and 16 more. Substitute compatibility should be verified for your specific system.
Is C3978 still available?
C3978 is currently cancelled.