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Technical Data Sheet
PartsTable / MRO / 321-1
321-1 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
SAS cables have specific lane counts: 4i (internal) or 4e (external) Cable length matters — too short won't reach, too long creates clutter
Verify connector type on BOTH ends — many SAS cables are asymmetric
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 OVERALL, overall_length: 3.000 INCHES NOMINAL IN, special_features: 0.773 IN. L; 0.749 OUTSIDE DIA; 0.813 SHOULDER DIA IN, style_designator: DOUBLE HEAD, surface_treatment: CHROMIUM OVERALL, large_end_head_angle: 15.0 DEGREES NOMINAL.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-01-028-0498, 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→ 321-1
NSN: 5999-01-028-0498
FSC: 5999
CAGE: 92755 — NORTHROP GRUMMAN SYSTEMS CORP DBA NORTHROP GRUMMAN SYSTEMS CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length3.000 INCHES NOMINAL IN
special_features0.773 IN. L; 0.749 OUTSIDE DIA; 0.813 SHOULDER DIA IN
style_designatorDOUBLE HEAD
surface_treatmentCHROMIUM OVERALL
large_end_head_angle15.0 DEGREES NOMINAL
lubrication_materialOIL AND GREASE
small_end_head_angle60.0 DEGREES NOMINAL
wrenching_surface_size0.234 INCHES NOMINAL SECOND END IN
end_item_identificationCPF 57MM MAIN GUN SYSTEM MM
wrenching_surface_shapeOVAL BOTH ENDS INTERNAL
overall_outside_diameter3.9370 INCHES NOMINAL IN
NSN5999-01-028-0498
COMPONENT DIAGRAM
CONN A SFF-8482 CONN B SFF-8087 LENGTH: SAS CABLE ASSEMBLY | SFF-8482 to SFF-8087 Cable length: | SAS | Shielded TITLE CABLE ASSY PN 321-1 MFR CAPACITOR,FIXED,ELECTROLYTIC
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)
SPECIAL FEATURESCOGNIZANT SERVICE:NAVY
SPECIAL FEATURESCOGNIZANT SERVICE:NAVY
VERIFIED SUBSTITUTES & CROSS-REFERENCES

No verified substitutes available.

LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 321-1?
321-1 is a CAPACITOR,FIXED,ELECTROLYTIC. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 321-1?
321-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-01-028-0498. 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