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BT354B — CUP,TAPERED ROLLER BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

BT354B: 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 OVERALL, flange_width: 0.1875 INCHES NOMINAL IN, overall_width: 0.6875 INCHES NOMINAL IN, style_designator: NORMAL ANGLE, FLANGED, backface_corner_radius: 0.0625 INCHES NOMINAL IN, flange_outside_diameter: 3.5339 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-142-4401, 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
BT354B
NSN: 3110-00-142-4401
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 01212 — FEDERAL-MOGUL CORP GOVERNMENT SALES DEPT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
flange_width0.1875 INCHES NOMINAL IN
overall_width0.6875 INCHES NOMINAL IN
style_designatorNORMAL ANGLE, FLANGED
backface_corner_radius0.0625 INCHES NOMINAL IN
flange_outside_diameter3.5339 INCHES NOMINAL IN
outer_ring_outside_diameter3.3464 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-142-4401
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: BT354B · 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
•
FLANGE OUTSIDE DIAMETER: 3.5339 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE, FLANGED
•
BACKFACE CORNER RADIUS: 0.0625 INCHES NOMINAL IN
•
FLANGE WIDTH: 0.1875 INCHES NOMINAL IN
•
OUTER RING OUTSIDE DIAMETER: 3.3464 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
FLANGE OUTSIDE DIAMETER3.5339 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE, FLANGED
OVERALL WIDTH0.6875 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0625 INCHES NOMINAL IN
FLANGE WIDTH0.1875 INCHES NOMINAL IN
OUTER RING OUTSIDE DIAMETER3.3464 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
6B0124Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 BT354B?
BT354B is a CUP,TAPERED ROLLER BEARING.
What parts can replace BT354B?
There is 1 known substitute for BT354B: 6B0124. Substitute compatibility should be verified for your specific system.
What is the NSN for BT354B?
BT354B is cataloged in the U.S. Government catalog under NSN 3110-00-142-4401. 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.