PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

RB-8ASBearing,plain,self-Aligning

Radial Bearing Corporation Dba Radial Bearing Corp of Connecticu Div Radial Bearing Llc · NSN 3120-00-675-5270 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-675-5270 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-675-5270. Primary manufacturer part number: RB-8AS.
Features
  • Bearing,plain,self-Aligning — FSC 3120
  • Lubrication Feature: GROOVE INTERNAL INNER MEMBER
  • Lubrication Feature: GROOVE INTERNAL OUTER MEMBER
  • Material: COPPER ALLOY INNER LAYER
  • Lubrication Feature: GROOVE EXTERNAL OUTER MEMBER
  • Material: STEEL COMP E52100 INNER MEMBER
  • Material: COPPER ALLOY OUTER RACE MEMBER
  • Outer Member Width: 0.3900 INCHES NOMINAL IN
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Copper Alloy Inner Layer construction
General Description

The Bearing,plain,self-Aligning, cataloged under National Stock Number 3120-00-675-5270, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Radial Bearing Corporation Dba Radial Bearing Corp of Connecticu Div Radial Bearing Llc. Government technical data includes 15 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-675-5270
Primary Part NumberRB-8AS
Item NameBearing,plain,self-Aligning
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerRadial Bearing Corporation Dba Radial Bearing Corp of Connecticu Div Radial Bearing Llc
StatusACTIVE
Lubrication FeatureGROOVE INTERNAL INNER MEMBER
Lubrication FeatureGROOVE INTERNAL OUTER MEMBER
MaterialCOPPER ALLOY INNER LAYER
Lubrication FeatureGROOVE EXTERNAL OUTER MEMBER
MaterialSTEEL COMP E52100 INNER MEMBER
MaterialCOPPER ALLOY OUTER RACE MEMBER
Outer Member Width0.3900 INCHES NOMINAL IN
Surface TreatmentCHROMIUM INNER MEMBER
Style DesignatorWITHOUT INSERT OR LINER
Lubrication FeaturePERFORATION INNER MEMBER
Lubrication FeaturePERFORATION OUTER RACE MEMBER
Bore Diameter0.4995 INCHES MINIMUM AND 0.5005 INCHES MAXIMUM IN
Surface TreatmentCADMIUM OUTER RACE MEMBER
Outer Member Outside Diameter1.0620 INCHES MINIMUM AND 1.0625 INCHES MAXIMUM IN
Inner Member Width0.4950 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
3110-00-142-4318KS8 INTERCHANGEABLE
Bearing,ball,airframe
Fag Bearings Corporation
2920-00-295-0415 INTERCHANGEABLE
End Bell,electrical Rotating Equ
5905-00-666-1597AS50045 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Amphenol Corp Div Amphenol Aerospace Operations
5340-01-053-258564-21-13 INTERCHANGEABLE
Catch,flush
Southco Inc
4520-01-428-690055586 INTERCHANGEABLE
Heating Element,electrical,nonim
Indeeco Llc Dba Indeeco
1080-01-541-30912KP755 INTERCHANGEABLE
Cover,camouflage Screening
Oshkosh Defense Llc
Cross-Reference Index
Part NumberManufacturer
KS8 Sargent Aerospace & Defense, Llc Dba Kahr Bearings (USA)
ASSB8-4001 New Hampshire Ball Bearings Inc Div Astro Division (USA)
RB-8AS PRIMARY Radial Bearing Corporation Dba Radial Bearing Corp of Connecticu Div Radial Bearing Llc (USA)
CSB8-102 Cabco Industries Inc. (USA)
RB-8AS PRIMARY Mechatronics, Inc. Div National Precision Bearing (USA)
BLN8055 Rbc Southwest Products, Inc. (USA)
55586 Rbc Transport Dynamics Corp Div Rbc Transport Dynamics (USA)
Related Parts
3110-00-142-4318INTERCHANGEABLE
BEARING,BALL,AIRFRAME
KS8
2920-00-295-0415INTERCHANGEABLE
END BELL,ELECTRICAL ROTATING EQU
5905-00-666-1597INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
AS50045
5340-01-053-2585INTERCHANGEABLE
CATCH,FLUSH
64-21-13
4520-01-428-6900INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
55586
1080-01-541-3091INTERCHANGEABLE
COVER,CAMOUFLAGE SCREENING
2KP755

Frequently Asked Questions

What is NSN 3120-00-675-5270?

NSN 3120-00-675-5270 is a Bearing,plain,self-Aligning, manufactured by Radial Bearing Corporation Dba Radial Bearing Corp of Connecticu Div Radial Bearing Llc, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-675-5270?

NSN 3120-00-675-5270 has 7 cross-referenced part numbers: KS8 (Sargent Aerospace & Defense, Llc Dba Kahr Bearings), ASSB8-4001 (New Hampshire Ball Bearings Inc Div Astro Division), RB-8AS (Radial Bearing Corporation Dba Radial Bearing Corp of Connecticu Div Radial Bearing Llc), CSB8-102 (Cabco Industries Inc.), RB-8AS (Mechatronics, Inc. Div National Precision Bearing) and 2 more.

What NSN replaces 3120-00-675-5270?

There are 6 known substitutes for 3120-00-675-5270: 3110-00-142-4318, 2920-00-295-0415, 5905-00-666-1597 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of RB-8AS?

Key specifications for RB-8AS: Lubrication Feature: GROOVE INTERNAL INNER MEMBER; Lubrication Feature: GROOVE INTERNAL OUTER MEMBER; Material: COPPER ALLOY INNER LAYER; Lubrication Feature: GROOVE EXTERNAL OUTER MEMBER. 15 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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