PartsTable
Technical Data Sheet
55780D ✓ 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 hole_diameter: 0.334 INCHES MINIMUM AND 0.354 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 3.865 INCHES MINIMUM AND 3.885 INCHES MAXIMUM IN, overall_length: 5.115 INCHES MINIMUM AND 5.135 INCHES MAXIMUM IN, bolt_circle_diameter: 4.178 INCHES MINIMUM AND 4.198 INCHES MAXIMUM IN, cross-sectional_thickness: 0.031 INCHES NOMINAL IN, cross-sectional_shape_style: SOLID SINGLE OR COMPOSITION. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-454-9654, 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
55780D
NSN: 5330-00-454-9654
FSC: 5330
CAGE: 92679 — NAVISTAR INTL CORP MELROSE PARK ENGINE PLANT LOCATION /MELROSE PARK/ (USA)
SPECIFICATIONS
hole_diameter0.334 INCHES MINIMUM AND 0.354 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
overall_width3.865 INCHES MINIMUM AND 3.885 INCHES MAXIMUM IN
overall_length5.115 INCHES MINIMUM AND 5.135 INCHES MAXIMUM IN
bolt_circle_diameter4.178 INCHES MINIMUM AND 4.198 INCHES MAXIMUM IN
cross-sectional_thickness0.031 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN5330-00-454-9654
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 55780D 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
BOLT CIRCLE DIAMETER: 4.178 INCHES MINIMUM AND 4.198 INCHES MAXIMUM IN
CROSS-SECTIONAL THICKNESS: 0.031 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
HOLE DIAMETER: 0.334 INCHES MINIMUM AND 0.354 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
TECHNICAL CHARACTERISTICS (FLIS)
BOLT CIRCLE DIAMETER4.178 INCHES MINIMUM AND 4.198 INCHES MAXIMUM IN
CROSS-SECTIONAL THICKNESS0.031 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OVERALL WIDTH3.865 INCHES MINIMUM AND 3.885 INCHES MAXIMUM IN
OVERALL LENGTH5.115 INCHES MINIMUM AND 5.135 INCHES MAXIMUM IN
HOLE DIAMETER0.334 INCHES MINIMUM AND 0.354 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
109293Interchangeable
interchangeable cross-reference
interchangeable
203809Interchangeable
interchangeable cross-reference
interchangeable
001-50656Interchangeable
interchangeable cross-reference
interchangeable
11CV12Interchangeable
interchangeable cross-reference
interchangeable
13362DAInterchangeable
interchangeable cross-reference
interchangeable
10606Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 55780D?
55780D is a GASKET.
What parts can replace 55780D?
There are 25 known substitutes for 55780D: 109293, 203809, 001-50656 and 22 more. Substitute compatibility should be verified for your specific system.
Is 55780D still available?
55780D is currently cancelled.
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