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L03993 — RETAINER,CAPACITOR

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

L03993: RETAINER,CAPACITOR.

The RETAINER,CAPACITOR 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, inside_length: 3.844 INCHES NOMINAL IN, overall_width: 0.750 INCHES NOMINAL IN, overall_height: 0.656 INCHES NOMINAL IN, overall_length: 5.000 INCHES NOMINAL IN, style_designator: EDGED STRAP, FOOTED HOLE MOUNTING OPEN TOP. This part is cataloged in the U.S.

Government catalog under NSN 5910-01-279-5181, 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→ L03993
NSN: 5910-01-279-5181
FSC: 5910 — Capacitors
CAGE: 16236 — DLA LAND AND MARITIME DBA ENGINEERING AND TECHNICAL SUPPORT DIV DOCUMENT STANDARDIZATION DIVISION (VENDOR ITEM DRAWINGS) (USA)
SPECIFICATIONS
materialSTEEL
inside_length3.844 INCHES NOMINAL IN
overall_width0.750 INCHES NOMINAL IN
overall_height0.656 INCHES NOMINAL IN
overall_length5.000 INCHES NOMINAL IN
special_featuresITEM MUST COMPLY WITH REQUIREMENTS OF DESC PRODUCTION STANDARD NO. L03993; FOR NAVY NUCLEAR PROPULSION PLANT PRODUCTS ONLY
style_designatorEDGED STRAP, FOOTED HOLE MOUNTING OPEN TOP
surface_treatmentCHROMATE
criticality_code_justificationFEAT
unthreaded_mounting_hole_diameterUNABLE TO DECODE
mounting_facility_type_and_quantityUNABLE TO DECODE
accommodated_item_securing_device_typeHOLES
NSN5910-01-279-5181
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RETAINER,CAPACITOR TITLE COMPONENT PN L03993 MFR RETAINER,CAPACITOR
KEY FEATURES
•
MOUNTING FACILITY TYPE AND QUANTITY: UNABLE TO DECODE
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE
•
INSIDE LENGTH: 3.844 INCHES NOMINAL IN
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
UNTHREADED MOUNTING HOLE DIAMETER: UNABLE TO DECODE
•
STYLE DESIGNATOR: EDGED STRAP, FOOTED HOLE MOUNTING OPEN TOP
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
MOUNTING FACILITY TYPE AND QUANTITYUNABLE TO DECODE
OVERALL HEIGHT0.656 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE
INSIDE LENGTH3.844 INCHES NOMINAL IN
CRITICALITY CODE JUSTIFICATIONFEAT
UNTHREADED MOUNTING HOLE DIAMETERUNABLE TO DECODE
STYLE DESIGNATOREDGED STRAP, FOOTED HOLE MOUNTING OPEN TOP
OVERALL LENGTH5.000 INCHES NOMINAL IN
ACCOMMODATED ITEM SECURING DEVICE TYPEHOLES
OVERALL WIDTH0.750 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5910 — Capacitors
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5910-00-000-1038 5910-00-000-1049 5910-00-000-1080 5910-00-000-6838 5910-00-001-1913 5910-00-001-2576 5910-00-001-2577 5910-00-001-2578
SUBSTITUTES & CROSS-REFERENCES 1
KAN2287Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is L03993?
L03993 is a RETAINER,CAPACITOR. It is classified as a MRO (MRO_GENERAL).
What parts can replace L03993?
There is 1 known substitute for L03993: KAN2287. Substitute compatibility should be verified for your specific system.
What is the NSN for L03993?
L03993 is cataloged in the U.S. Government catalog under NSN 5910-01-279-5181. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.