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Technical Data Sheet
PartsTable / COMPONENT / 55AC4420
55AC4420 ✓ Verified by PartsTable
— · PSU
WHAT YOU NEED TO KNOW
Always quote matching pair — mixed wattage causes throttling Platinum/Titanium = higher efficiency = lower power cost over time
AC or DC input? Verify customer site power
PRODUCT OVERVIEW

The POWER SUPPLY ASSEMBLY is a the manufacturer power supply unit built for continuous operation in enterprise server and storage platforms. Key specifications include material: STEEL, slot_width: 0.203 INCHES NOMINAL IN, thread_size: 2-1/4-16, thread_class: 2A A, hole_diameter: 0.203 INCHES NOMINAL IN, thread_length: 0.375 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-555-9404, 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
55AC4420
NSN: 4730-00-555-9404
FSC: 4730
CAGE: 23382 — FWD SEAGRAVE HOLDINGS LP (USA)
SPECIFICATIONS
materialSTEEL
slot_width0.203 INCHES NOMINAL IN
thread_size2-1/4-16
thread_class2A A
hole_diameter0.203 INCHES NOMINAL IN
thread_length0.375 INCHES NOMINAL IN
overall_length0.375 INCHES NOMINAL IN
style_designatorROUND SLOTTED, EXTERNAL THREAD, BOSS
thread_directionRIGHT-HAND
hole_or_slot_quantity2
screw_thread_locationEXTERNAL
casehardening_indicatorNOT CASEHARDENED
NSN4730-00-555-9404
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 55AC4420 MFR OEM Platinum
KEY FEATURES
•
THREAD CLASS: 2A A
•
HOLE DIAMETER: 0.203 INCHES NOMINAL IN
•
THREAD SIZE: 2-1/4-16
•
STYLE DESIGNATOR: ROUND SLOTTED, EXTERNAL THREAD, BOSS
•
MAJOR UNTHREADED OUTSIDE DIAMETER: 2.241 INCHES MINIMUM AND 2.250 INCHES MAXIMUM IN
•
SMALLEST INSIDE DIAMETER: 1.547 INCHES NOMINAL IN
•
SCREW THREAD LOCATION: EXTERNAL
•
MATERIAL: STEEL
TYPICAL APPLICATIONS
  • Server power supply replacement (failed or degraded)
  • Redundant power upgrade for high-availability
  • Power capacity upgrade for GPU or expansion configurations
  • Hot-swap power maintenance in production environments
  • Spare inventory for break-fix operations
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2A A
HOLE DIAMETER0.203 INCHES NOMINAL IN
THREAD SIZE2-1/4-16
STYLE DESIGNATORROUND SLOTTED, EXTERNAL THREAD, BOSS
MAJOR UNTHREADED OUTSIDE DIAMETER2.241 INCHES MINIMUM AND 2.250 INCHES MAXIMUM IN
SMALLEST INSIDE DIAMETER1.547 INCHES NOMINAL IN
SCREW THREAD LOCATIONEXTERNAL
MATERIALSTEEL
OVERALL LENGTH0.375 INCHES NOMINAL IN
SLOT WIDTH0.203 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
203502Interchangeable
interchangeable cross-reference
interchangeable
10387886Interchangeable
interchangeable cross-reference
interchangeable
20350200Interchangeable
interchangeable cross-reference
interchangeable
90-201 ITEM 5Interchangeable
interchangeable cross-reference
interchangeable
C-4420Interchangeable
interchangeable cross-reference
interchangeable
861617Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 55AC4420?
55AC4420 is a POWER SUPPLY ASSEMBLY.
What parts can replace 55AC4420?
There are 9 known substitutes for 55AC4420: 203502, 10387886, 20350200 and 6 more. Substitute compatibility should be verified for your specific system.
Is 55AC4420 still available?
55AC4420 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026