PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B4BBearing,plain,self-Aligning

Roller Bearing Company of America, Inc. · NSN 3120-00-613-1488 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-613-1488 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-613-1488. Primary manufacturer part number: B4B.
Features
  • Bearing,plain,self-Aligning — FSC 3120
  • Material Document and Classification: AMS 6440 ASSN STD SINGLE MATERIAL RESPONSE INNER MEMBER
  • Hardness Rating: 57.0 ROCKWELL C MINIMUM AND 61.0 ROCKWELL C MAXIMUM INNER MEMBER
  • Style Designator: WITHOUT INSERT OR LINER
  • Material: COPPER ALLOY OUTER RACE MEMBER
  • Material: STEEL COMP E52100 INNER MEMBER
  • Surface Treatment: CHROMIUM INNER MEMBER
  • Surface Treatment Document and Classification: AMS 2406 ASSN STD SINGLE TREATMENT RESPONSE INNER MEMBER
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Copper Alloy Outer Race Member construction
General Description

The Bearing,plain,self-Aligning, cataloged under National Stock Number 3120-00-613-1488, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Roller Bearing Company of America, Inc.. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-613-1488
Primary Part NumberB4B
Item NameBearing,plain,self-Aligning
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerRoller Bearing Company of America, Inc.
StatusACTIVE
Material Document and ClassificationAMS 6440 ASSN STD SINGLE MATERIAL RESPONSE INNER MEMBER
Hardness Rating57.0 ROCKWELL C MINIMUM AND 61.0 ROCKWELL C MAXIMUM INNER MEMBER
Style DesignatorWITHOUT INSERT OR LINER
MaterialCOPPER ALLOY OUTER RACE MEMBER
MaterialSTEEL COMP E52100 INNER MEMBER
Surface TreatmentCHROMIUM INNER MEMBER
Surface Treatment Document and ClassificationAMS 2406 ASSN STD SINGLE TREATMENT RESPONSE INNER MEMBER
Outer Member Outside Diameter0.7495 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
Bore Diameter0.2495 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
Outer Member Width0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN
Inner Member Width0.3700 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
Static Radial Load Rating5000 POUNDS LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5940-00-144-24332596205 INTERCHANGEABLE
Splice,conductor
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
6610-00-515-5845 INTERCHANGEABLE
Indicator,turn and Slip
3120-00-941-3124706B306P7 INTERCHANGEABLE
Bearing,plain,self-Aligning
Roller Bearing Company of America, Inc.
6625-01-114-3476B-4-0 INTERCHANGEABLE
Lead,test
Fluke Electronics Corp
Cross-Reference Index
Part NumberManufacturer
B4B PRIMARY Roller Bearing Company of America, Inc. (USA)
706B306P6 General Electric Company (USA)
Related Parts
5940-00-144-2433INTERCHANGEABLE
SPLICE,CONDUCTOR
2596205
6610-00-515-5845INTERCHANGEABLE
INDICATOR,TURN AND SLIP
3120-00-941-3124INTERCHANGEABLE
BEARING,PLAIN,SELF-ALIGNING
706B306P7
6625-01-114-3476INTERCHANGEABLE
LEAD,TEST
B-4-0

Frequently Asked Questions

What is NSN 3120-00-613-1488?

NSN 3120-00-613-1488 is a Bearing,plain,self-Aligning, manufactured by Roller Bearing Company of America, Inc., classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-613-1488?

NSN 3120-00-613-1488 has 2 cross-referenced part numbers: B4B (Roller Bearing Company of America, Inc.), 706B306P6 (General Electric Company).

What NSN replaces 3120-00-613-1488?

There are 4 known substitutes for 3120-00-613-1488: 5940-00-144-2433, 6610-00-515-5845, 3120-00-941-3124 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B4B?

Key specifications for B4B: Material Document and Classification: AMS 6440 ASSN STD SINGLE MATERIAL RESPONSE INNER MEMBER; Hardness Rating: 57.0 ROCKWELL C MINIMUM AND 61.0 ROCKWELL C MAXIMUM INNER MEMBER; Style Designator: WITHOUT INSERT OR LINER; Material: COPPER ALLOY OUTER RACE MEMBER. 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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