PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

30307Bearing,roller,tapered

The Timken Corporation · NSN 3110-01-139-6123 · FSC 3110 · No Item Name Available
Verified by PartsTable
NSN 3110-01-139-6123 — this item is cataloged by the U.S. Government under National Stock Number 3110-01-139-6123. Primary manufacturer part number: 30307.
Features
  • Bearing,roller,tapered — FSC 3110
  • Overall Outside Diameter: 80.00 MILLIMETERS NOMINAL MM
  • Standout Width: 4.75 MILLIMETERS NOMINAL MM
  • Cone Width: 21.00 MILLIMETERS NOMINAL MM
  • Bore Diameter: 35.0 MILLIMETERS NOMINAL MM
  • Cup Width: 18.00 MILLIMETERS NOMINAL MM
  • Backface Corner Radius: 2.50 MILLIMETERS NOMINAL MM
  • Style Designator: STRAIGHT BORE, NORMAL ANGLE
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 3110-01-139-6123, 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 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 7 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
NSN3110-01-139-6123
Primary Part Number30307
Item NameBearing,roller,tapered
FSC / FSG3110 / 31 — No Item Name Available
ManufacturerThe Timken Corporation
StatusACTIVE
Overall Outside Diameter80.00 MILLIMETERS NOMINAL MM
Standout Width4.75 MILLIMETERS NOMINAL MM
Cone Width21.00 MILLIMETERS NOMINAL MM
Bore Diameter35.0 MILLIMETERS NOMINAL MM
Cup Width18.00 MILLIMETERS NOMINAL MM
Backface Corner Radius2.50 MILLIMETERS NOMINAL MM
Style DesignatorSTRAIGHT BORE, NORMAL ANGLE
Cone Corner Radius2.50 MILLIMETERS NOMINAL MM
MaterialSTEEL OVERALL
Retainer Fabrication MethodPRESSED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
2530-00-450-927130307L INTERCHANGEABLE
Axle Housing
Midwest Gear & Tool, Inc.
6625-00-488-4040303-07 INTERCHANGEABLE
Voltmeter
Ballantine Laboratories Inc
2940-00-521-8488K0030309 INTERCHANGEABLE
Air Cleaner,intake
Leroi International Inc Dba Compair Leroi
5910-00-648-7503AP071B INTERCHANGEABLE
Capacitor,variable,mica Dielectr
F W Capacitors Inc
1650-00-946-875130307 INTERCHANGEABLE
Piston,damper
The Boeing Company Div Defense
5950-01-079-4710 INTERCHANGEABLE
Transformer,pulse
5905-01-245-635530307 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Elbitamerica, Inc.
5950-01-335-48289355993 INTERCHANGEABLE
Transformer,pulse
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
4240-01-574-7818 INTERCHANGEABLE
Lubricant,303 Aeros
Cross-Reference Index
Part NumberManufacturer
30307 Skf Usa Inc. (USA)
30307 PRIMARY The Timken Corporation (USA)
30307 Skf Do Brasil Ltda. (BRA)
012 468 0 Sew-Eurodrive Inc (USA)
D27Z4621-A Ford Motor Company (USA)
D27Z4621-A Ford Motor Co Ford Parts and Service Div Government Part Sales (USA)
30307 Federal-Mogul Corp Government Sales Dept (USA)
Related Parts
2530-00-450-9271INTERCHANGEABLE
AXLE HOUSING
30307L
6625-00-488-4040INTERCHANGEABLE
VOLTMETER
303-07
2940-00-521-8488INTERCHANGEABLE
AIR CLEANER,INTAKE
K0030309
5910-00-648-7503INTERCHANGEABLE
CAPACITOR,VARIABLE,MICA DIELECTR
AP071B
1650-00-946-8751INTERCHANGEABLE
PISTON,DAMPER
30307
5950-01-079-4710INTERCHANGEABLE
TRANSFORMER,PULSE
5905-01-245-6355INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
30307
5950-01-335-4828INTERCHANGEABLE
TRANSFORMER,PULSE
9355993
4240-01-574-7818INTERCHANGEABLE
LUBRICANT,303 AEROS

Frequently Asked Questions

What is NSN 3110-01-139-6123?

NSN 3110-01-139-6123 is a Bearing,roller,tapered, manufactured by The Timken Corporation, classified under FSC 3110 (No Item Name Available). Status: active.

What are the part numbers for NSN 3110-01-139-6123?

NSN 3110-01-139-6123 has 7 cross-referenced part numbers: 30307 (Skf Usa Inc.), 30307 (The Timken Corporation), 30307 (Skf Do Brasil Ltda.), 012 468 0 (Sew-Eurodrive Inc), D27Z4621-A (Ford Motor Company) and 2 more.

What NSN replaces 3110-01-139-6123?

There are 9 known substitutes for 3110-01-139-6123: 2530-00-450-9271, 6625-00-488-4040, 2940-00-521-8488 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 30307?

Key specifications for 30307: Overall Outside Diameter: 80.00 MILLIMETERS NOMINAL MM; Special Features: TOLERANCES ARE TO ISO STANDARD H; Standout Width: 4.75 MILLIMETERS NOMINAL MM; Cone Width: 21.00 MILLIMETERS NOMINAL MM. 12 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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