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Technical Data Sheet
PartsTable / COMPONENT / 703243
703243 ✓ Verified by PartsTable
Zapf · 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 BEARING,ROLLER,TAPERED is a Zapf tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL OVERALL, cup_width: 0.3437 INCHES NOMINAL IN, cone_width: 0.4326 INCHES NOMINAL IN, bore_diameter: 0.5900 INCHES NOMINAL IN, overall_width: 0.4330 INCHES NOMINAL IN, standout_width: 0.0893 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-155-7438, 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
703243
NSN: 3110-00-155-7438
FSC: 3110
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.3437 INCHES NOMINAL IN
cone_width0.4326 INCHES NOMINAL IN
bore_diameter0.5900 INCHES NOMINAL IN
overall_width0.4330 INCHES NOMINAL IN
standout_width0.0893 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.0310 INCHES NOMINAL IN
backface_corner_radius0.0460 INCHES NOMINAL IN
overall_outside_diameter1.3775 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-155-7438
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 703243 · Zapf ⚠ 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: 0.0460 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
CUP WIDTH: 0.3437 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.0310 INCHES NOMINAL IN
•
BORE DIAMETER: 0.5900 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
OVERALL OUTSIDE DIAMETER: 1.3775 INCHES NOMINAL IN
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 RADIUS0.0460 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
CUP WIDTH0.3437 INCHES NOMINAL IN
CONE CORNER RADIUS0.0310 INCHES NOMINAL IN
BORE DIAMETER0.5900 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
OVERALL OUTSIDE DIAMETER1.3775 INCHES NOMINAL IN
OVERALL WIDTH0.4330 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
CONE WIDTH0.4326 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
6808Interchangeable
interchangeable cross-reference
interchangeable
MS35198-98Interchangeable
interchangeable cross-reference
interchangeable
P320A410Interchangeable
interchangeable cross-reference
interchangeable
C223-92-1Interchangeable
interchangeable cross-reference
interchangeable
LMX58Interchangeable
interchangeable cross-reference
interchangeable
6292Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 703243?
703243 is a BEARING,ROLLER,TAPERED manufactured by Zapf.
What parts can replace 703243?
There are 20 known substitutes for 703243: 6808, MS35198-98, P320A410 and 17 more. Substitute compatibility should be verified for your specific system.
Is 703243 still available?
703243 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026