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Technical Data Sheet
PartsTable / COMPONENT / A544
A544 ✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

The BATTERY,NONRECHARGEABLE 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 shape: CYLINDRICAL, material: STEEL, face_width: 0.750 INCHES NOMINAL IN, head_style: FLAT, slot_width: 0.1580 INCHES MINIMUM AND 0.1620 INCHES MAXIMUM IN, stem_style: SLOTTED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-142-4338, 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
A544
NSN: 3110-00-142-4338
FSC: 3110
CAGE: 43991 — FAG BEARINGS CORPORATION (USA)
SPECIFICATIONS
shapeCYLINDRICAL
materialSTEEL
face_width0.750 INCHES NOMINAL IN
head_styleFLAT
slot_width0.1580 INCHES MINIMUM AND 0.1620 INCHES MAXIMUM IN
stem_styleSLOTTED
tooth_typeINTEGRAL
head_height0.0470 INCHES MINIMUM AND 0.0570 INCHES MAXIMUM IN
neck_radius0.4375 INCHES NOMINAL IN
slot_length0.3300 INCHES MINIMUM AND 0.3380 INCHES MAXIMUM IN
slot_radius0.0790 INCHES MINIMUM AND 0.0810 INCHES MAXIMUM IN
stem_length6.1250 INCHES NOMINAL IN
NSN3110-00-142-4338
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: A544 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
INNER RING WIDTH: 0.2810 INCHES NOMINAL IN
•
LOAD DIRECTION: RADIAL
•
OUTER RING WIDTH: 0.2500 INCHES NOMINAL IN
•
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-3278 MIL SPEC SINGLE MATERIAL RESPONSE
•
OVERALL OUTSIDE DIAMETER: 2.2500 INCHES NOMINAL IN
•
BORE DIAMETER: 1.8125 INCHES NOMINAL IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
STYLE DESIGNATOR: SINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
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)
INNER RING WIDTH0.2810 INCHES NOMINAL IN
LOAD DIRECTIONRADIAL
OUTER RING WIDTH0.2500 INCHES NOMINAL IN
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-3278 MIL SPEC SINGLE MATERIAL RESPONSE
OVERALL OUTSIDE DIAMETER2.2500 INCHES NOMINAL IN
BORE DIAMETER1.8125 INCHES NOMINAL IN
MATERIALSTEEL CORROSION RESISTING OVERALL
STYLE DESIGNATORSINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
45126Interchangeable
interchangeable cross-reference
interchangeable
704Interchangeable
interchangeable cross-reference
interchangeable
58-10133Interchangeable
interchangeable cross-reference
interchangeable
SD5439Interchangeable
interchangeable cross-reference
interchangeable
5325122Interchangeable
interchangeable cross-reference
interchangeable
AC544Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A544?
A544 is a BATTERY,NONRECHARGEABLE.
What parts can replace A544?
There are 25 known substitutes for A544: 45126, 704, 58-10133 and 22 more. Substitute compatibility should be verified for your specific system.
Is A544 still available?
A544 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