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PartsTable / MRO / D578
D578 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The D578 is a the manufacturer industrial component. Key specifications include material: CELLULOSE OVERALL, body_style: BUSHING MOUNTED, body_length: 0.875 INCHES NOMINAL IN, body_diameter: 1.125 INCHES NOMINAL IN, hole_diameter: 0.469 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 6.500 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-146-2803, 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
MRO→ MRO_GENERAL→ D578
NSN: 5331-00-146-2803
FSC: 5331 — O-RING
CAGE: 30793 — INSINGER MACHINE CO (USA)
SPECIFICATIONS
materialCELLULOSE OVERALL
body_styleBUSHING MOUNTED
body_length0.875 INCHES NOMINAL IN
body_diameter1.125 INCHES NOMINAL IN
hole_diameter0.469 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width6.500 INCHES NOMINAL IN
bushing_length0.625 INCHES NOMINAL IN
inclosure_typeFULLY INCLOSED
actuator_height0.375 INCHES NOMINAL IN
mounting_methodTHREADED BUSHING
actuator_diameter0.469 INCHES NOMINAL IN
center_hole_diameter0.983 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN
NSN5331-00-146-2803
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: D578 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
•
CENTER HOLE DIAMETER: 0.983 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.983 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
1941120Interchangeable
interchangeable cross-reference
interchangeable
9216Interchangeable
interchangeable cross-reference
interchangeable
298-06067-17Interchangeable
interchangeable cross-reference
interchangeable
D578Interchangeable
interchangeable cross-reference
interchangeable
2808A417Interchangeable
interchangeable cross-reference
interchangeable
D578-001Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D578?
D578 is a D578. It is classified as a MRO (MRO_GENERAL).
What parts can replace D578?
There are 6 known substitutes for D578: 1941120, 9216, 298-06067-17 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for D578?
D578 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-146-2803. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026