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Technical Data Sheet
PartsTable / COMPONENT / MU103B
MU103B ✓ 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 CUP,TAPERED ROLLER BEARING is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL OVERALL, overall_width: 0.6250 INCHES NOMINAL IN, outside_diameter: 2.5625 INCHES NOMINAL IN, special_features: STEEP ANGLE, backface_corner_radius: 0.0630 INCHES NOMINAL IN, standard_tolerance_designation: AFBMA CLASS 2. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0540, 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
MU103B
NSN: 3110-00-100-0540
FSC: 3110
CAGE: 77237 — DANA OFF HIGHWAY PRODUCTS, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width0.6250 INCHES NOMINAL IN
outside_diameter2.5625 INCHES NOMINAL IN
special_featuresSTEEP ANGLE
backface_corner_radius0.0630 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-0540
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: MU103B · 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
•
BACKFACE CORNER RADIUS: 0.0630 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 2.5625 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
MATERIAL: STEEL OVERALL
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
BACKFACE CORNER RADIUS0.0630 INCHES NOMINAL IN
OUTSIDE DIAMETER2.5625 INCHES NOMINAL IN
SPECIAL FEATURESSTEEP ANGLE
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
MATERIALSTEEL OVERALL
OVERALL WIDTH0.6250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
A23256Interchangeable
interchangeable cross-reference
interchangeable
23256Interchangeable
interchangeable cross-reference
interchangeable
4730L20-000Interchangeable
interchangeable cross-reference
interchangeable
854005Interchangeable
interchangeable cross-reference
interchangeable
FP212AInterchangeable
interchangeable cross-reference
interchangeable
850911Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MU103B?
MU103B is a CUP,TAPERED ROLLER BEARING.
What parts can replace MU103B?
There are 25 known substitutes for MU103B: A23256, 23256, 4730L20-000 and 22 more. Substitute compatibility should be verified for your specific system.
Is MU103B still available?
MU103B 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