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Technical Data Sheet
PartsTable / COMPONENT / A4251-1
A4251-1 ✓ 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 cushion: NOT INCLUDED, material: COPPER ALLOY LOCATION NOT OTHERWISE SPECIFIED, mounting_pad: NOT INCLUDED, overall_width: 0.406 INCHES NOMINAL IN, overall_length: 1.344 INCHES NOMINAL IN, style_designator: SLOTTED CURVED ARCH. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0603, 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
A4251-1
NSN: 3110-00-100-0603
FSC: 3110
CAGE: 62265 — VOLVO TRUCKS NORTH AMERICA, INC. DBA (FOREIGN PARENT IS VOLVO LASTVAGNAR AB, GOTEBORG, SWEDEN.) (USA)
SPECIFICATIONS
cushionNOT INCLUDED
materialCOPPER ALLOY LOCATION NOT OTHERWISE SPECIFIED
mounting_padNOT INCLUDED
overall_width0.406 INCHES NOMINAL IN
overall_length1.344 INCHES NOMINAL IN
style_designatorSLOTTED CURVED ARCH
surface_treatmentLACQUER
material_thickness0.031 INCHES NOMINAL IN
mounting_hole_size0.156 INCHES NOMINAL IN
inside_diameter/arch_length0.781 INCHES NOMINAL IN
distance_between_mounting_hole_centers0.906 INCHES NOMINAL IN
distance_between_base_and_inside_of_arch0.656 INCHES NOMINAL IN
NSN3110-00-100-0603
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: A4251-1 · 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
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 4.1250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE
•
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)
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
OVERALL WIDTH1.1250 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
OUTSIDE DIAMETER4.1250 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
149546Interchangeable
interchangeable cross-reference
interchangeable
A4251-1Interchangeable
interchangeable cross-reference
interchangeable
59-412Interchangeable
interchangeable cross-reference
interchangeable
7RA12106Interchangeable
interchangeable cross-reference
interchangeable
103529Interchangeable
interchangeable cross-reference
interchangeable
14307Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A4251-1?
A4251-1 is a CUP,TAPERED ROLLER BEARING.
What parts can replace A4251-1?
There are 17 known substitutes for A4251-1: 149546, A4251-1, 59-412 and 14 more. Substitute compatibility should be verified for your specific system.
Is A4251-1 still available?
A4251-1 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