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Technical Data Sheet
PartsTable / COMPONENT / 121-262
121-262 ✓ 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 COMP E51100 OR STEEL COMP E52100 OVERALL, terminal_type: FLAT SURFACE TOP, alignment_type: RIGID, overall_height: 1.0000 INCHES NOMINAL IN, surface_finish: GROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-1796, 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
121-262
NSN: 3110-00-156-1796
FSC: 3110
CAGE: 72915 — GENERAL MOTORS CORP ELECTRO-MOTIVE DIV (USA)
SPECIFICATIONS
shapeCYLINDRICAL
materialSTEEL COMP E51100 OR STEEL COMP E52100 OVERALL
terminal_typeFLAT SURFACE TOP
alignment_typeRIGID
overall_height1.0000 INCHES NOMINAL IN
surface_finishGROUND
overall_diameter0.965 INCHES NOMINAL IN
special_featuresLITHIUM/MANGANESE DIOXIDE BATTERY; TERMINALS FLAT, PC PINS; AVERAGE WEIGHT 0.217 OZ; OPERATING TEMP -30 TO +70 DEG C OZ
style_designatorGROOVED RACE SURFACE
voltage_in_volts3.0
overall_thickness0.197 INCHES NOMINAL IN
terminal_quantity1
NSN3110-00-156-1796
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 121-262 · 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
•
SURFACE FINISH: GROUND
•
ALIGNMENT TYPE: RIGID
•
STYLE DESIGNATOR: GROOVED RACE SURFACE
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR THRUST BEARINGS
•
BORE SMALLEST DIAMETER: 2.5000 INCHES NOMINAL IN
•
THRUST DIRECTIONAL CAPABILITY DESIGNATION: SINGLE
•
OVERALL OUTSIDE DIAMETER: 3.7187 INCHES NOMINAL IN
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)
SURFACE FINISHGROUND
ALIGNMENT TYPERIGID
STYLE DESIGNATORGROOVED RACE SURFACE
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR THRUST BEARINGS
OVERALL HEIGHT1.0000 INCHES NOMINAL IN
BORE SMALLEST DIAMETER2.5000 INCHES NOMINAL IN
THRUST DIRECTIONAL CAPABILITY DESIGNATIONSINGLE
OVERALL OUTSIDE DIAMETER3.7187 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
MATERIALSTEEL COMP E51100 OR STEEL COMP E52100 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
AN500-8-4Interchangeable
interchangeable cross-reference
interchangeable
20506-92Interchangeable
interchangeable cross-reference
interchangeable
131954Interchangeable
interchangeable cross-reference
interchangeable
4318PInterchangeable
interchangeable cross-reference
interchangeable
4318Interchangeable
IBM 17.54GB 10K RPM Ultra SCSI Disk Unit
interchangeable
4308Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121-262?
121-262 is a BATTERY,NONRECHARGEABLE.
What parts can replace 121-262?
There are 26 known substitutes for 121-262: AN500-8-4, 20506-92, 131954 and 23 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 121-262?
121-262 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-1796. 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