PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

KWB8SSGBearing,plain,self-Aligning

Sargent Aerospace & Defense, Llc Dba Kahr Bearings · NSN 3120-00-661-7205 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-661-7205 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-661-7205. Primary manufacturer part number: KWB8SSG.
Features
  • Bearing,plain,self-Aligning — FSC 3120
  • Bore Diameter: 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN
  • Outer Member Width: 0.5000 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
  • Lubrication Feature: GROOVE INTERNAL OUTER MEMBER
  • Lubrication Feature: GROOVE EXTERNAL OUTER MEMBER
  • Style Designator: WITHOUT INSERT OR LINER
  • Surface Treatment: CHROMIUM INNER MEMBER
  • Material: STEEL CORROSION RESISTING OUTER RACE MEMBER
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Corrosion Resisting Outer Race Member construction
General Description

The Bearing,plain,self-Aligning, cataloged under National Stock Number 3120-00-661-7205, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Sargent Aerospace & Defense, Llc Dba Kahr Bearings. 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-661-7205
Primary Part NumberKWB8SSG
Item NameBearing,plain,self-Aligning
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerSargent Aerospace & Defense, Llc Dba Kahr Bearings
StatusACTIVE
Bore Diameter0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN
Outer Member Width0.5000 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
Lubrication FeatureGROOVE INTERNAL OUTER MEMBER
Lubrication FeatureGROOVE EXTERNAL OUTER MEMBER
Style DesignatorWITHOUT INSERT OR LINER
Surface TreatmentCHROMIUM INNER MEMBER
MaterialSTEEL CORROSION RESISTING OUTER RACE MEMBER
Lubrication FeaturePERFORATION OUTER RACE MEMBER
MaterialSTEEL COMP E52100 INNER MEMBER
Inner Member Width0.6200 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN
Outer Member Outside Diameter0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
3020-00-722-1422536052 INTERCHANGEABLE
Gear,worm
R F Products, Inc
5110-01-231-5709901-3 INTERCHANGEABLE
Tool,stripping
Amphenol Corporation Div Amphenol Rf
5310-01-358-6623WS-8 INTERCHANGEABLE
Washer,lock
Adams Rite Mfg. Co.
Cross-Reference Index
Part NumberManufacturer
KWB8SSG PRIMARY Sargent Aerospace & Defense, Llc Dba Kahr Bearings (USA)
KWB8SSGMILG3278 Sargent Aerospace & Defense, Llc Dba Kahr Bearings (USA)
WS-8 Roller Bearing Company of America, Inc. (USA)
BHDR8000G Rbc Southwest Products, Inc. (USA)
Related Parts
3020-00-722-1422INTERCHANGEABLE
GEAR,WORM
536052
5110-01-231-5709INTERCHANGEABLE
TOOL,STRIPPING
901-3
5310-01-358-6623INTERCHANGEABLE
WASHER,LOCK
WS-8

Frequently Asked Questions

What is NSN 3120-00-661-7205?

NSN 3120-00-661-7205 is a Bearing,plain,self-Aligning, manufactured by Sargent Aerospace & Defense, Llc Dba Kahr Bearings, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-661-7205?

NSN 3120-00-661-7205 has 4 cross-referenced part numbers: KWB8SSG (Sargent Aerospace & Defense, Llc Dba Kahr Bearings), KWB8SSGMILG3278 (Sargent Aerospace & Defense, Llc Dba Kahr Bearings), WS-8 (Roller Bearing Company of America, Inc.), BHDR8000G (Rbc Southwest Products, Inc.).

What NSN replaces 3120-00-661-7205?

There are 3 known substitutes for 3120-00-661-7205: 3020-00-722-1422, 5110-01-231-5709, 5310-01-358-6623. Verify interchangeability with system specifications before substitution.

What are the specifications of KWB8SSG?

Key specifications for KWB8SSG: Bore Diameter: 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN; Outer Member Width: 0.5000 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN; Lubrication Feature: GROOVE INTERNAL OUTER MEMBER; Lubrication Feature: GROOVE EXTERNAL OUTER MEMBER. 11 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com