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PartsTable / COMPONENT / SM-C-321720
SM-C-321720 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

CAPACITOR,FIXED,PAPER DIELECTRIC. Key specifications include material: STEEL, end_similarity: NOT IDENTICAL, overall_length: 5.375 INCHES NOMINAL IN, surface_finish: 125.0 MICROINCHES, first_end_style: CIRCULAR GROOVED, second_end_style: EXTERNAL THREADED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3040-00-703-1518, 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
SM-C-321720
NSN: 3040-00-703-1518
FSC: 3040
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialSTEEL
step_quantity3
end_similarityNOT IDENTICAL
overall_length5.375 INCHES NOMINAL IN
surface_finish125.0 MICROINCHES
first_end_styleCIRCULAR GROOVED
second_end_styleEXTERNAL THREADED
first_end_diameter0.3125 INCHES NOMINAL IN
second_end_diameter0.1380 INCHES NOMINAL IN
largest_step_diameter0.3123 INCHES NOMINAL IN
first_end_groove_width0.0350 INCHES NOMINAL IN
first_end_groove_diameter0.2900 INCHES NOMINAL IN
NSN3040-00-703-1518
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,PAPER DIELECTRIC TITLE COMPONENT PN SM-C-321720 MFR CAPACITOR,FIXED,PAPER
KEY FEATURES
•
SECOND END DIAMETER: 0.1380 INCHES NOMINAL IN
•
FIRST END GROOVE WIDTH: 0.0350 INCHES NOMINAL IN
•
FIRST END DIAMETER: 0.3125 INCHES NOMINAL IN
•
SECOND END EXTERNAL THREAD LENGTH: 0.2372 INCHES NOMINAL IN
•
FIRST END STYLE: CIRCULAR GROOVED
•
FIRST END GROOVE DIAMETER: 0.2900 INCHES NOMINAL IN
•
SURFACE FINISH: 125.0 MICROINCHES
•
STEP QUANTITY: 3
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 (FLIS)
SECOND END DIAMETER0.1380 INCHES NOMINAL IN
FIRST END GROOVE WIDTH0.0350 INCHES NOMINAL IN
FIRST END DIAMETER0.3125 INCHES NOMINAL IN
SECOND END EXTERNAL THREAD LENGTH0.2372 INCHES NOMINAL IN
FIRST END STYLECIRCULAR GROOVED
FIRST END GROOVE DIAMETER0.2900 INCHES NOMINAL IN
SURFACE FINISH125.0 MICROINCHES
STEP QUANTITY3
END SIMILARITYNOT IDENTICAL
LARGEST STEP DIAMETER0.3123 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
A340X14Interchangeable
interchangeable cross-reference
interchangeable
J74167Interchangeable
interchangeable cross-reference
interchangeable
4252P11Interchangeable
interchangeable cross-reference
interchangeable
11926Interchangeable
interchangeable cross-reference
interchangeable
1904452Interchangeable
interchangeable cross-reference
interchangeable
81-5/8Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SM-C-321720?
SM-C-321720 is a CAPACITOR,FIXED,PAPER DIELECTRIC.
What parts can replace SM-C-321720?
There are 19 known substitutes for SM-C-321720: A340X14, J74167, 4252P11 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SM-C-321720?
SM-C-321720 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3040-00-703-1518. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026