PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

T121Bearing,roller,thrust

The Timken Corporation · NSN 3110-01-491-8977 · FSC 3110 · No Item Name Available
Verified by PartsTable
NSN 3110-01-491-8977 — this item is cataloged by the U.S. Government under National Stock Number 3110-01-491-8977. Primary manufacturer part number: T121.
Features
  • Bearing,roller,thrust — FSC 3110
  • Bore Diameter: 1.2093 INCHES NOMINAL IN
  • Overall Outside Diameter: 2.1875 INCHES NOMINAL IN
  • Style Designator: TAPERED ROLLERS, BANDED OD
  • 3 verified cross-references
  • Primary manufacturer: The Timken Corporation
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
General Description

The Bearing,roller,thrust, cataloged under National Stock Number 3110-01-491-8977, is classified within Federal Supply Class 3110 (No Item Name Available) of the Bearings group. The primary manufacturer of record is The Timken Corporation. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3110-01-491-8977
Primary Part NumberT121
Item NameBearing,roller,thrust
FSC / FSG3110 / 31 — No Item Name Available
ManufacturerThe Timken Corporation
StatusACTIVE
Bore Diameter1.2093 INCHES NOMINAL IN
Overall Outside Diameter2.1875 INCHES NOMINAL IN
Style DesignatorTAPERED ROLLERS, BANDED OD
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
3110-00-100-548659200-59412 INTERCHANGEABLE
Bearing,roller,tapered
The Timken Corporation
5120-00-111-1254T12-1 INTERCHANGEABLE
Installing Tool,rin
Woodward Hrt Inc
5330-00-351-4132SCB61809 INTERCHANGEABLE
Gasket
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5136-00-528-22991552 INTERCHANGEABLE
Tap,thread Cutting
Stanley Tools Div of Stanley Works
5220-00-545-9266T121 INTERCHANGEABLE
Handle,gage,checkin
Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator
3439-01-103-0244 INTERCHANGEABLE
Tip,electric Soldering Iron
3040-01-238-4010 INTERCHANGEABLE
Lever,manual Control
5331-01-459-6758T121 INTERCHANGEABLE
O-Ring
Unertl John Optical Co Inc
5180-01-502-8951 INTERCHANGEABLE
Tool Kit,general Mechanic's
Cross-Reference Index
Part NumberManufacturer
T121 The Timken Company (FRA)
T121 PRIMARY The Timken Corporation (USA)
5700227 Tld Europe (FRA)
Related Parts
3110-00-100-5486INTERCHANGEABLE
BEARING,ROLLER,TAPERED
59200-59412
5120-00-111-1254INTERCHANGEABLE
INSTALLING TOOL,RIN
T12-1
5330-00-351-4132INTERCHANGEABLE
GASKET
SCB61809
5136-00-528-2299INTERCHANGEABLE
TAP,THREAD CUTTING
1552
5220-00-545-9266INTERCHANGEABLE
HANDLE,GAGE,CHECKIN
T121
3439-01-103-0244INTERCHANGEABLE
TIP,ELECTRIC SOLDERING IRON
3040-01-238-4010INTERCHANGEABLE
LEVER,MANUAL CONTROL
5331-01-459-6758INTERCHANGEABLE
O-RING
T121
5180-01-502-8951INTERCHANGEABLE
TOOL KIT,GENERAL MECHANIC'S

Frequently Asked Questions

What is NSN 3110-01-491-8977?

NSN 3110-01-491-8977 is a Bearing,roller,thrust, manufactured by The Timken Corporation, classified under FSC 3110 (No Item Name Available). Status: active.

What are the part numbers for NSN 3110-01-491-8977?

NSN 3110-01-491-8977 has 3 cross-referenced part numbers: T121 (The Timken Company), T121 (The Timken Corporation), 5700227 (Tld Europe).

What NSN replaces 3110-01-491-8977?

There are 9 known substitutes for 3110-01-491-8977: 3110-00-100-5486, 5120-00-111-1254, 5330-00-351-4132 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of T121?

Key specifications for T121: Bore Diameter: 1.2093 INCHES NOMINAL IN; Overall Height: 0.6200 INCHES NOMINAL IN; Overall Outside Diameter: 2.1875 INCHES NOMINAL IN; Style Designator: TAPERED ROLLERS, BANDED OD. 4 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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