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Technical Data Sheet
PartsTable / MRO / C493
C493 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The CAPACITOR,FIXED,ELECTROLYTIC is a the manufacturer 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 1010 OVERALL, thickness: 0.095 INCHES NOMINAL IN, body_style: W/O MTG FACILITIES, AXIAL TERMINALS, shell_type: SOLID, body_length: 2.380 INCHES NOMINAL IN, thread_class: 2A 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 5310-00-010-3345, 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→ C493
NSN: 5310-00-010-3345
FSC: 5310
CAGE: 01976 — ACCO INDUSTRIES INC SUB OF BABCOCK INTL INC (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
thickness0.095 INCHES NOMINAL IN
body_styleW/O MTG FACILITIES, AXIAL TERMINALS
shell_typeSOLID
body_length2.380 INCHES NOMINAL IN
thread_class2A A
body_diameter0.478 INCHES NOMINAL IN
hole_diameter0.6563 INCHES NOMINAL IN
physical_formCRYSTAL
terminal_typeTAB, SOLDER LUG SINGLE MATING END SINGLE CONTACT GROUPING
overall_length0.930 INCHES NOMINAL IN
shell_materialSTEEL
NSN5310-00-010-3345
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: C493 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 1010 OVERALL
•
THICKNESS: 0.095 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.6563 INCHES NOMINAL IN
•
OVERALL DIAMETER: 1.3125 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 (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 1010 OVERALL
THICKNESS0.095 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.6563 INCHES NOMINAL IN
OVERALL DIAMETER1.3125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
33D00400Interchangeable
interchangeable cross-reference
interchangeable
C4715-1Interchangeable
interchangeable cross-reference
interchangeable
910255Interchangeable
interchangeable cross-reference
interchangeable
0910255-9Interchangeable
interchangeable cross-reference
interchangeable
028174Interchangeable
interchangeable cross-reference
interchangeable
103347Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C493?
C493 is a CAPACITOR,FIXED,ELECTROLYTIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace C493?
There are 27 known substitutes for C493: 33D00400, C4715-1, 910255 and 24 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C493?
C493 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-010-3345. 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