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PartsTable / COMPONENT / J9521
J9521 ✓ 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,MICA DIELECTRIC. Key specifications include material: STEEL, pipe_size: 0.125 INCHES NOMINAL IN, unit_type: TAPERED, screw_size: 0.250 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN, flute_design: STRAIGHT, nondefinitive_spec/std_data: 4 TYPE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-00-180-0777, 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
J9521
NSN: 5120-00-180-0777
FSC: 5120
CAGE: 1CV05 — THE STANLEY WORKS DBA STANLEY PROTO (USA)
SPECIFICATIONS
materialSTEEL
pipe_size0.125 INCHES NOMINAL IN
unit_typeTAPERED
screw_size0.250 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
flute_designSTRAIGHT
nondefinitive_spec/std_data4 TYPE
specification/standard_data05047-ASME B107.410 CAT 46 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN5120-00-180-0777
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,FIXED,MICA DIELECTRIC TITLE COMPONENT PN J9521 MFR CAPACITOR,FIXED,MICA D
KEY FEATURES
•
NONDEFINITIVE SPEC/STD DATA: 4 TYPE
•
SPECIFICATION/STANDARD DATA: 05047-ASME B107.410 CAT 46 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
SCREW SIZE: 0.250 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
•
PIPE SIZE: 0.125 INCHES NOMINAL IN
•
MATERIAL: STEEL
•
UNIT TYPE: TAPERED
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)
NONDEFINITIVE SPEC/STD DATA4 TYPE
SPECIFICATION/STANDARD DATA05047-ASME B107.410 CAT 46 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NONDEFINITIVE SPEC/STD DATA4 TYPE
SCREW SIZE0.250 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
SCREW SIZE0.250 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
PIPE SIZE0.125 INCHES NOMINAL IN
MATERIALSTEEL
UNIT TYPETAPERED
PIPE SIZE0.125 INCHES NOMINAL IN
FLUTE DESIGNSTRAIGHT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
37C300485P103Interchangeable
interchangeable cross-reference
interchangeable
95786Interchangeable
interchangeable cross-reference
interchangeable
37C300485P101Interchangeable
interchangeable cross-reference
interchangeable
A-A-3021 CL2Interchangeable
interchangeable cross-reference
interchangeable
GGG-E-936 TY1CL2Interchangeable
interchangeable cross-reference
interchangeable
B107.410 CAT 46 TY4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is J9521?
J9521 is a CAPACITOR,FIXED,MICA DIELECTRIC.
What parts can replace J9521?
There are 29 known substitutes for J9521: 37C300485P103, 95786, 37C300485P101 and 26 more. Substitute compatibility should be verified for your specific system.
Is J9521 still available?
J9521 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026