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Technical Data Sheet
PartsTable / MRO / 18-61
18-61 ✓ Verified by PartsTable
Siku · MRO · MRO_GENERAL
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

The CAPACITOR,FIXED,ELECTROLYTIC is a Siku cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include material: STEEL COMP 316 STEM, nut_style: HEXAGON, anode_type: PLAIN FOIL, body_style: W/O MTG FACILITIES, TERMINAL(S) ON ONE END, nut_height: 0.258 INCHES MINIMUM AND 0.273 INCHES MAXIMUM IN, body_length: 3.582 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 4310-00-364-8472, 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→ 18-61
NSN: 4310-00-364-8472
FSC: 4310
CAGE: 49576 — QUINCY COMPRESSOR DIVISION OF COLTEC INDUSTRIES INC DBA QUINCY COMPRESSOR DIV QUINCY COMPRESSOR (USA)
SPECIFICATIONS
materialSTEEL COMP 316 STEM
nut_styleHEXAGON
anode_typePLAIN FOIL
body_styleW/O MTG FACILITIES, TERMINAL(S) ON ONE END
nut_height0.258 INCHES MINIMUM AND 0.273 INCHES MAXIMUM IN
body_length3.582 INCHES NOMINAL IN
bonnet_typeINSIDE SCREW
thread_class2B
body_diameter1.487 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
connection_typeTHREADED INTERNAL PIPE ALL ENDS
terminal_length0.467 INCHES NOMINAL IN
NSN4310-00-364-8472
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: Siku CAPACITOR,FIXED,ELECTROLYTIC TITLE COMPONENT PN 18-61 MFR Siku CAPACITOR,FIXED,ELECTR
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL,3.375 IN. LG 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 (FLIS)
END ITEM IDENTIFICATIONQUINCY AIR COMPRESSOR MODEL D320
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL,3.375 IN. LG IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
16T116Interchangeable
interchangeable cross-reference
interchangeable
905365-1Interchangeable
interchangeable cross-reference
interchangeable
16270Interchangeable
interchangeable cross-reference
interchangeable
18-61HPInterchangeable
interchangeable cross-reference
interchangeable
18-61Interchangeable
interchangeable cross-reference
interchangeable
810-835Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 18-61?
18-61 is a CAPACITOR,FIXED,ELECTROLYTIC manufactured by Siku. It is classified as a MRO (MRO_GENERAL).
What parts can replace 18-61?
There are 15 known substitutes for 18-61: 16T116, 905365-1, 16270 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 18-61?
18-61 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4310-00-364-8472. 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