PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

25821Cup,tapered Roller Bearing

The Timken Corporation · NSN 3110-00-100-0551 · FSC 3110 · No Item Name Available
Verified by PartsTable
NSN 3110-00-100-0551 — this item is cataloged by the U.S. Government under National Stock Number 3110-00-100-0551. Primary manufacturer part number: 25821.
Features
  • Cup,tapered Roller Bearing — FSC 3110
  • Outside Diameter: 2.8345 INCHES NOMINAL IN
  • Backface Corner Radius: 0.0312 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • Style Designator: NORMAL ANGLE
  • Standard Tolerance Designation: AFBMA CLASS 2
  • 45 verified cross-references
  • Primary manufacturer: The Timken Corporation
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Overall construction
General Description

The Cup,tapered Roller Bearing, cataloged under National Stock Number 3110-00-100-0551, 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 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 45 commercial cross-references from 37 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN3110-00-100-0551
Primary Part Number25821
Item NameCup,tapered Roller Bearing
FSC / FSG3110 / 31 — No Item Name Available
ManufacturerThe Timken Corporation
StatusCANCELLED
Outside Diameter2.8345 INCHES NOMINAL IN
Backface Corner Radius0.0312 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Style DesignatorNORMAL ANGLE
Standard Tolerance DesignationAFBMA CLASS 2
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5305-00-014-5366 INTERCHANGEABLE
Screw,drive
1660-00-024-609752800 INTERCHANGEABLE
Dipstick Assembly
Honeywell International Inc. Div Aerospace - Torrance
5935-00-112-323238250 INTERCHANGEABLE
Connector,plug,electrical
Amphenol Corporation Div Amphenol Rf
2810-00-118-719725821 INTERCHANGEABLE
Cover,case Assembly
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
5330-00-212-003125821 INTERCHANGEABLE
Packing,preformed
Setra Systems, Inc. Dba Gems Sensors
5330-00-250-5817 INTERCHANGEABLE
Gasket
5985-00-264-7487672070 INTERCHANGEABLE
Antenna
Lockheed Martin Corporation Div Rms - Mitchel Field
4720-00-274-11541525-6 INTERCHANGEABLE
Hose,nonmetallic
Danfoss Power Solutions II, Llc
5210-00-277-1621599-9642-30 INTERCHANGEABLE
Gage Stock,thickness
Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa
4820-00-369-36292100-3127769PC75 INTERCHANGEABLE
Seat,valve
Naval Ship Systems Command
Cross-Reference Index
Part NumberManufacturer
230068 Allis-Chalmers Corp (USA)
RT9017 White Farm Equipment Co Sub of Tic Investment Inc (USA)
165964R1 Navistar International Corporation Dba Navistar (USA)
25821 Ntn Bearing Corporation of America (USA)
P327 Mott Corp (USA)
0BT25821 Lift Parts Mfg Co Inc Div of Echlin Mfg Co the (USA)
698399 Chrysler Corp Hamtramck Assembly (USA)
230068 Itt Goulds Pumps, Inc. (USA)
25821 Tyson Bearing Co Div Skf Industries Inc (USA)
651444 Chrysler Realty Company Llc Dba Daimler Chrysler (USA)
672070 Clark Equipment Co (USA)
25821 PRIMARY The Timken Corporation (USA)
25821 Linde Lift Truck Corp. (USA)
652554 Chrysler Realty Company Llc Dba Daimler Chrysler (USA)
25821 Meritor Industrial Products, Llc (USA)
043934 New Holland Construction (USA)
52800 Am General Llc (USA)
25821 Linde Material Handling North America Corporation (USA)
165964R1 Navistar Intl Corp Truck Br Ohio Plant (USA)
25821 Meritor Heavy Vehicle Systems Llc Off Highway Products and Supply Div Heavy Vehicles Components Opns (USA)
Related Parts
5305-00-014-5366INTERCHANGEABLE
SCREW,DRIVE
1660-00-024-6097INTERCHANGEABLE
DIPSTICK ASSEMBLY
52800
5935-00-112-3232INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
38250
2810-00-118-7197INTERCHANGEABLE
COVER,CASE ASSEMBLY
25821
5330-00-212-0031INTERCHANGEABLE
PACKING,PREFORMED
25821
5330-00-250-5817INTERCHANGEABLE
GASKET
5985-00-264-7487INTERCHANGEABLE
ANTENNA
672070
4720-00-274-1154INTERCHANGEABLE
HOSE,NONMETALLIC
1525-6
5210-00-277-1621INTERCHANGEABLE
GAGE STOCK,THICKNESS
599-9642-30
4820-00-369-3629INTERCHANGEABLE
SEAT,VALVE
2100-3127769PC75
3030-00-529-0482INTERCHANGEABLE
BELT,V
4330-00-678-0309INTERCHANGEABLE
FILTER ELEMENT,FLUID
2306-17

Frequently Asked Questions

What is NSN 3110-00-100-0551?

NSN 3110-00-100-0551 is a Cup,tapered Roller Bearing, manufactured by The Timken Corporation, classified under FSC 3110 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3110-00-100-0551?

NSN 3110-00-100-0551 has 45 cross-referenced part numbers: 230068 (Allis-Chalmers Corp), RT9017 (White Farm Equipment Co Sub of Tic Investment Inc), 165964R1 (Navistar International Corporation Dba Navistar), 25821 (Ntn Bearing Corporation of America), P327 (Mott Corp) and 40 more.

What NSN replaces 3110-00-100-0551?

There are 12 known substitutes for 3110-00-100-0551: 5305-00-014-5366, 1660-00-024-6097, 5935-00-112-3232 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 25821?

Key specifications for 25821: Overall Width: 0.6250 INCHES NOMINAL IN; Outside Diameter: 2.8345 INCHES NOMINAL IN; Backface Corner Radius: 0.0312 INCHES NOMINAL IN; Material: STEEL OVERALL. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3110-00-100-0551 still in active supply?

NSN 3110-00-100-0551 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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