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Technical Data Sheet
PartsTable / COMPONENT / BT3720B
BT3720B ✓ 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, flange_width: 0.1875 INCHES NOMINAL IN, overall_width: 0.9375 INCHES NOMINAL IN, style_designator: NORMAL ANGLE, FLANGED, backface_corner_radius: 0.1250 INCHES NOMINAL IN, flange_outside_diameter: 3.8558 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-142-4410, 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
BT3720B
NSN: 3110-00-142-4410
FSC: 3110
CAGE: 01212 — FEDERAL-MOGUL CORP GOVERNMENT SALES DEPT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
flange_width0.1875 INCHES NOMINAL IN
overall_width0.9375 INCHES NOMINAL IN
style_designatorNORMAL ANGLE, FLANGED
backface_corner_radius0.1250 INCHES NOMINAL IN
flange_outside_diameter3.8558 INCHES NOMINAL IN
outer_ring_outside_diameter3.6718 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-142-4410
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: BT3720B · 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
•
OUTER RING OUTSIDE DIAMETER: 3.6718 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
FLANGE OUTSIDE DIAMETER: 3.8558 INCHES NOMINAL IN
•
FLANGE WIDTH: 0.1875 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: NORMAL ANGLE, FLANGED
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
OUTER RING OUTSIDE DIAMETER3.6718 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
FLANGE OUTSIDE DIAMETER3.8558 INCHES NOMINAL IN
FLANGE WIDTH0.1875 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STYLE DESIGNATORNORMAL ANGLE, FLANGED
OVERALL WIDTH0.9375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
817083Interchangeable
interchangeable cross-reference
interchangeable
C7898-150Interchangeable
interchangeable cross-reference
interchangeable
214-255Interchangeable
interchangeable cross-reference
interchangeable
F10536BInterchangeable
interchangeable cross-reference
interchangeable
3720BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BT3720B?
BT3720B is a CUP,TAPERED ROLLER BEARING.
What parts can replace BT3720B?
There are 5 known substitutes for BT3720B: 817083, C7898-150, 214-255 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BT3720B?
BT3720B is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-142-4410. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026