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BT383 ✓ 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, head_style: HEXAGON, head_height: 0.4375 INCHES NOMINAL IN, thread_class: 2A A, overall_width: 0.8268 INCHES NOMINAL IN, thread_length: 0.9375 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 3110-00-100-0301, 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
BT383
NSN: 3110-00-100-0301
FSC: 3110
CAGE: 01212 — FEDERAL-MOGUL CORP GOVERNMENT SALES DEPT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.4375 INCHES NOMINAL IN
thread_class2A A
overall_width0.8268 INCHES NOMINAL IN
thread_length0.9375 INCHES NOMINAL IN
inclosure_typeFULLY INCLOSED
fastener_length5.125 INCHES NOMINAL IN
outside_diameter3.9370 INCHES NOMINAL IN
special_features0.29688 IN. DIA. COTTER KEY HOLE 0.25 IN. FROM BOLT END TO CENTER IN
style_designatorNORMAL ANGLE
thread_directionRIGHT-HAND
NSN3110-00-100-0301
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: BT383 · 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
•
BACKFACE CORNER RADIUS: 0.0312 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
OUTSIDE DIAMETER: 3.9370 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)
BACKFACE CORNER RADIUS0.0312 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
OUTSIDE DIAMETER3.9370 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
MATERIALSTEEL OVERALL
OVERALL WIDTH0.8268 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
3306568Interchangeable
interchangeable cross-reference
interchangeable
6977Interchangeable
interchangeable cross-reference
interchangeable
DS8095Interchangeable
interchangeable cross-reference
interchangeable
31TA56Interchangeable
interchangeable cross-reference
interchangeable
41X10Interchangeable
interchangeable cross-reference
interchangeable
15412Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BT383?
BT383 is a CUP,TAPERED ROLLER BEARING.
What parts can replace BT383?
There are 22 known substitutes for BT383: 3306568, 6977, DS8095 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BT383?
BT383 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0301. 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