PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

39590-39520BBearing,roller,tapered

The Timken Corporation · NSN 3110-00-293-8978 · FSC 3110 · No Item Name Available
Verified by PartsTable
NSN 3110-00-293-8978 — this item is cataloged by the U.S. Government under National Stock Number 3110-00-293-8978. Primary manufacturer part number: 39590-39520B.
Features
  • Bearing,roller,tapered — FSC 3110
  • Standard Tolerance Designation: AFBMA CLASS 2
  • Retainer Fabrication Method: PRESSED
  • Overall Outside Diameter: 4.4375 INCHES NOMINAL IN
  • Cone Corner Radius: 1.1400 INCHES NOMINAL IN
  • Cup Width: 0.9375 INCHES NOMINAL IN
  • Bore Diameter: 2.6250 INCHES NOMINAL IN
  • Standout Width: 0.4688 INCHES NOMINAL IN
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Overall construction
General Description

The Bearing,roller,tapered, cataloged under National Stock Number 3110-00-293-8978, 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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN3110-00-293-8978
Primary Part Number39590-39520B
Item NameBearing,roller,tapered
FSC / FSG3110 / 31 — No Item Name Available
ManufacturerThe Timken Corporation
StatusCANCELLED
Standard Tolerance DesignationAFBMA CLASS 2
Retainer Fabrication MethodPRESSED
Overall Outside Diameter4.4375 INCHES NOMINAL IN
Cone Corner Radius1.1400 INCHES NOMINAL IN
Cup Width0.9375 INCHES NOMINAL IN
Bore Diameter2.6250 INCHES NOMINAL IN
Standout Width0.4688 INCHES NOMINAL IN
Cone Width1.1875 INCHES NOMINAL IN
Style DesignatorSTRAIGHT BORE, NORMAL ANGLE
MaterialSTEEL OVERALL
Backface Corner Radius0.1250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
3110-00-100-5654 INTERCHANGEABLE
Bearing,roller,tapered
3110-00-190-6665 INTERCHANGEABLE
Bearing,roller,tapered
Cross-Reference Index
Part NumberManufacturer
39590-39520B The Timken Corporation (USA)
AA59650-080 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
A-A-59650 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
4EF6-73354-5A1 Rexnord Industries Llc (USA)
Related Parts
3110-00-100-5654INTERCHANGEABLE
BEARING,ROLLER,TAPERED
3110-00-190-6665INTERCHANGEABLE
BEARING,ROLLER,TAPERED

Frequently Asked Questions

What is NSN 3110-00-293-8978?

NSN 3110-00-293-8978 is a Bearing,roller,tapered, manufactured by The Timken Corporation, classified under FSC 3110 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3110-00-293-8978?

NSN 3110-00-293-8978 has 4 cross-referenced part numbers: 39590-39520B (The Timken Corporation), AA59650-080 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), A-A-59650 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), 4EF6-73354-5A1 (Rexnord Industries Llc).

What NSN replaces 3110-00-293-8978?

There are 2 known substitutes for 3110-00-293-8978: 3110-00-100-5654, 3110-00-190-6665. Verify interchangeability with system specifications before substitution.

What are the specifications of 39590-39520B?

Key specifications for 39590-39520B: Standard Tolerance Designation: AFBMA CLASS 2; Retainer Fabrication Method: PRESSED; Overall Outside Diameter: 4.4375 INCHES NOMINAL IN; Cone Corner Radius: 1.1400 INCHES NOMINAL IN. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3110-00-293-8978 still in active supply?

NSN 3110-00-293-8978 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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