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Technical Data Sheet
PartsTable / COMPONENT / 1B3991
1B3991 ✓ 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

CONE AND ROLLERS,TAPERED ROLLER. Key specifications include end_type: GLAND NUT W/INTERNAL THREAD SECOND END, material: PLASTIC BOWL, body_style: BUSHING MOUNT, body_width: 0.625 INCHES NOMINAL IN, body_height: 0.594 INCHES NOMINAL IN, body_length: 1.125 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 3110-00-100-3080, 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
1B3991
NSN: 3110-00-100-3080
FSC: 3110
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
end_typeGLAND NUT W/INTERNAL THREAD SECOND END
materialPLASTIC BOWL
body_styleBUSHING MOUNT
body_width0.625 INCHES NOMINAL IN
body_height0.594 INCHES NOMINAL IN
body_length1.125 INCHES NOMINAL IN
current_typeAC
thread_class3B SECOND END
usage_designNONFOAMING BEVERAGES
hole_diameter0.141 INCHES MINIMUM AND 0.148 INCHES MAXIMUM IN
thread_length0.310 INCHES NOMINAL SECOND END IN
actuator_styleROUND
NSN3110-00-100-3080
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 1B3991 · 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
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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
8960144Interchangeable
interchangeable cross-reference
interchangeable
5584Interchangeable
interchangeable cross-reference
interchangeable
08960144Interchangeable
interchangeable cross-reference
interchangeable
707771Interchangeable
interchangeable cross-reference
interchangeable
AN101207Interchangeable
interchangeable cross-reference
interchangeable
231007Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1B3991?
1B3991 is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace 1B3991?
There are 24 known substitutes for 1B3991: 8960144, 5584, 08960144 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1B3991?
1B3991 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-3080. 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