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81984 — BATTERY POWER SUPPLY

✓ Government record, cited
— · PSU
PRODUCT OVERVIEW

81984: BATTERY POWER SUPPLY.

The BATTERY POWER SUPPLY is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. This part is cataloged in the U.S. Government catalog under NSN 5305-01-193-7942, 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
81984
NSN: 5305-01-193-7942
NIINs: 011937942, 011988857, 016733082
FSC: 5305 — Screws
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
NSN5305-01-193-7942
COMPONENT DIAGRAM
PULL TAB AIRFLOW —W PLATINUM 100-240V~ 50/60Hz OEM BACKPLANE CONN ~200 mm HOT-PLUG POWER SUPPLY | —W | Platinum AC input 100-240V | Redundant pair required | Match wattage in same chassis TITLE PSU —W PN 81984 MFR OEM Platinum
KEY FEATURES
•
WIDTH ACROSS FLATS: 0.750 INCHES NOMINAL IN
•
HEAD HEIGHT: 1.000 INCHES NOMINAL IN
•
FASTENER LENGTH: 6.000 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2 FED STD SINGLE TREATMENT RESPONSE OVERALL
•
DISTANCE FROM CENTERLINE TO FLAT: 0.375 INCHES NOMINAL IN
•
THREAD LENGTH: 5.000 INCHES NOMINAL IN
•
HARDNESS RATING: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
•
HOLE CONFIGURATION STYLE: ROUND INTERNAL HEXAGON
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
WIDTH ACROSS FLATS0.750 INCHES NOMINAL IN
HEAD HEIGHT1.000 INCHES NOMINAL IN
FASTENER LENGTH6.000 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2 FED STD SINGLE TREATMENT RESPONSE OVERALL
DISTANCE FROM CENTERLINE TO FLAT0.375 INCHES NOMINAL IN
THREAD LENGTH5.000 INCHES NOMINAL IN
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
HOLE CONFIGURATION STYLEROUND INTERNAL HEXAGON
NOMINAL THREAD DIAMETER1.000 INCHES IN
HEAD STYLEFLAT CHAMFER
SUBSTITUTES & CROSS-REFERENCES 2
SK 8172-503Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
9338121Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 81984?
81984 is a BATTERY POWER SUPPLY.
What parts can replace 81984?
There are 2 known substitutes for 81984: SK 8172-503, 9338121. Substitute compatibility should be verified for your specific system.
What is the NSN for 81984?
81984 is cataloged in the U.S. Government catalog under NSN 5305-01-193-7942. 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.