PartsTable
Technical Data Sheet
PartsTable / MRO / C9-18
C9-18 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

CAPACITOR,FIXED,CERAMIC DIELECTR. Key specifications include material: CERAMIC CASE, body_style: W/O MTG FACILITIES, RADIAL TERMINALS, head_style: PAN NO. 2, body_length: 0.166 INCHES MAXIMUM IN, head_height: 0.165 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN, thread_class: 3A A.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-500-9394, 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→ C9-18
NSN: 5305-00-500-9394
FSC: 5305
CAGE: U4574 — FNH UK LTD (GBR)
SPECIFICATIONS
materialCERAMIC CASE
body_styleW/O MTG FACILITIES, RADIAL TERMINALS
head_stylePAN NO. 2
body_length0.166 INCHES MAXIMUM IN
head_height0.165 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN
thread_class3A A
body_diameter0.375 INCHES NOMINAL IN
head_diameter0.970 INCHES MINIMUM AND 0.990 INCHES MAXIMUM IN
thread_length0.355 INCHES MAXIMUM IN
screw_materialSTEEL COMP 1117
fastener_length0.435 INCHES NOMINAL IN
terminal_length1.500 INCHES MINIMUM IN
NSN5305-00-500-9394
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: C9-18 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD LENGTH: 0.355 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-L-3150, CLASS 2 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-16173, CLASS 2 MIL SPEC 1ST TREATMENT RESPONSE
•
SCREW SURFACE TREATMENT: PHOSPHATE MANGANESE OR PHOSPHATE ZINC
•
NOMINAL THREAD DIAMETER: 0.562 INCHES IN
•
THREAD CLASS: 3A A
•
THREAD SERIES DESIGNATOR: UNEF
•
HEAD DIAMETER: 0.970 INCHES MINIMUM AND 0.990 INCHES MAXIMUM IN
•
HEAD STYLE: PAN NO. 2
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)
THREAD LENGTH0.355 INCHES MAXIMUM IN
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-L-3150, CLASS 2 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-16173, CLASS 2 MIL SPEC 1ST TREATMENT RESPONSE
SCREW SURFACE TREATMENTPHOSPHATE MANGANESE OR PHOSPHATE ZINC
NOMINAL THREAD DIAMETER0.562 INCHES IN
THREAD CLASS3A A
THREAD SERIES DESIGNATORUNEF
HEAD DIAMETER0.970 INCHES MINIMUM AND 0.990 INCHES MAXIMUM IN
HEAD STYLEPAN NO. 2
THREAD DIRECTIONRIGHT-HAND
INTERNAL DRIVE STYLESLOT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
A10147Interchangeable
Cartridge,30 Millimeter
interchangeable
1305-B104Interchangeable
Cartridge,30 Millimeter
interchangeable
10015467-003Interchangeable
interchangeable cross-reference
interchangeable
C918Interchangeable
interchangeable cross-reference
interchangeable
855-200X5V5203IInterchangeable
interchangeable cross-reference
interchangeable
67261Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C9-18?
C9-18 is a CAPACITOR,FIXED,CERAMIC DIELECTR. It is classified as a MRO (MRO_GENERAL).
What parts can replace C9-18?
There are 18 known substitutes for C9-18: A10147, 1305-B104, 10015467-003 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C9-18?
C9-18 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-500-9394. 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