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10389112 — CUP,TAPERED ROLLER BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

10389112: CUP,TAPERED ROLLER BEARING.

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 COMP 4720 CUP, overall_width: 1.3438 INCHES NOMINAL IN, outside_diameter: 5.7500 INCHES MINIMUM AND 5.7510 INCHES MAXIMUM IN, style_designator: STEEP ANGLE, backface_corner_radius: 0.1300 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-138-1377, 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
10389112
NSN: 3110-01-138-1377
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: A486G — NIMIKKEISTOKESKUS NCB FINLAND (FIN)
SPECIFICATIONS
materialSTEEL COMP 4720 CUP
overall_width1.3438 INCHES NOMINAL IN
outside_diameter5.7500 INCHES MINIMUM AND 5.7510 INCHES MAXIMUM IN
style_designatorSTEEP ANGLE
backface_corner_radius0.1300 INCHES NOMINAL IN
NSN3110-01-138-1377
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 10389112 · 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
•
STYLE DESIGNATOR: STEEP ANGLE
•
OUTSIDE DIAMETER: 5.7500 INCHES MINIMUM AND 5.7510 INCHES MAXIMUM IN
•
BACKFACE CORNER RADIUS: 0.1300 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 4720 CUP
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
STYLE DESIGNATORSTEEP ANGLE
OVERALL WIDTH1.3438 INCHES NOMINAL IN
OUTSIDE DIAMETER5.7500 INCHES MINIMUM AND 5.7510 INCHES MAXIMUM IN
BACKFACE CORNER RADIUS0.1300 INCHES NOMINAL IN
MATERIALSTEEL COMP 4720 CUP
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 10389112?
10389112 is a CUP,TAPERED ROLLER BEARING.
What is the NSN for 10389112?
10389112 is cataloged in the U.S. Government catalog under NSN 3110-01-138-1377. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.