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9978001 — CAPACITOR,FIXED,CERAMIC DIELECTR

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

9978001: CAPACITOR,FIXED,CERAMIC DIELECTR.

CAPACITOR,FIXED,CERAMIC DIELECTR. Key specifications include material: STEEL, end_similarity: NOT IDENTICAL, overall_length: 2.219 INCHES NOMINAL IN, first_end_style: PLAIN, second_end_style: SPLINED (INVOLUTE), special_features: FIRST END INCLUDES INTERNAL SPLINES AND LOCKWIRE HOLES. This part is cataloged in the U.S.

Government catalog under NSN 3040-00-736-0370, 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
9978001
NSN: 3040-00-736-0370
FSC: 3040 — Miscellaneous Power Transmission Equipment
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialSTEEL
step_quantity5
end_similarityNOT IDENTICAL
overall_length2.219 INCHES NOMINAL IN
first_end_stylePLAIN
second_end_styleSPLINED (INVOLUTE)
special_featuresFIRST END INCLUDES INTERNAL SPLINES AND LOCKWIRE HOLES
first_end_diameter0.4670 INCHES NOMINAL IN
second_end_diameter0.2500 INCHES NOMINAL IN
largest_step_diameter0.750 INCHES NOMINAL IN
second_end_spline_length0.475 INCHES NOMINAL IN
second_end_pitch_diameter0.3125 INCHES NOMINAL IN
NSN3040-00-736-0370
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,CERAMIC DIELECTR TITLE COMPONENT PN 9978001 MFR CAPACITOR,FIXED,CERAMI
KEY FEATURES
•
STEP QUANTITY: 5
•
FIRST END DIAMETER: 0.4670 INCHES NOMINAL IN
•
SECOND END DIAMETER: 0.2500 INCHES NOMINAL IN
•
LARGEST STEP DIAMETER: 0.750 INCHES NOMINAL IN
•
SECOND END SPLINE MINOR DIAMETER: 0.2620 INCHES NOMINAL IN
•
FIRST END STYLE: PLAIN
•
SECOND END SPLINE MAJOR DIAMETER: 0.3438 INCHES NOMINAL IN
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS
STEP QUANTITY5
FIRST END DIAMETER0.4670 INCHES NOMINAL IN
SECOND END DIAMETER0.2500 INCHES NOMINAL IN
LARGEST STEP DIAMETER0.750 INCHES NOMINAL IN
SECOND END SPLINE MINOR DIAMETER0.2620 INCHES NOMINAL IN
FIRST END STYLEPLAIN
SECOND END SPLINE MAJOR DIAMETER0.3438 INCHES NOMINAL IN
OVERALL LENGTH2.219 INCHES NOMINAL IN
END SIMILARITYNOT IDENTICAL
SECOND END SPLINE QUANTITY10
SUBSTITUTES & CROSS-REFERENCES 1
56572Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 9978001?
9978001 is a CAPACITOR,FIXED,CERAMIC DIELECTR.
What parts can replace 9978001?
There is 1 known substitute for 9978001: 56572. Substitute compatibility should be verified for your specific system.
What is the NSN for 9978001?
9978001 is cataloged in the U.S. Government catalog under NSN 3040-00-736-0370. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.