PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

LS6Bearing,plain,self-Aligning

Roller Bearing Company of America, Inc. · NSN 3120-00-662-1974 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-662-1974 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-662-1974. Primary manufacturer part number: LS6.
Features
  • Bearing,plain,self-Aligning — FSC 3120
  • Style Designator: WITH INSERT AND/OR LINER
  • Material: STEEL COMP E52100 INNER MEMBER
  • Surface Treatment: CADMIUM OUTER RACE MEMBER
  • Outer Member Width: 0.3725 INCHES NOMINAL IN
  • Inner Member Width: 0.4950 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN
  • Material: COPPER ALLOY RACE INSERT
  • Material: STEEL OUTER RACE MEMBER
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Comp E52100 Inner Member construction
General Description

The Bearing,plain,self-Aligning, cataloged under National Stock Number 3120-00-662-1974, 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 13 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
NSN3120-00-662-1974
Primary Part NumberLS6
Item NameBearing,plain,self-Aligning
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerRoller Bearing Company of America, Inc.
StatusCANCELLED
Style DesignatorWITH INSERT AND/OR LINER
MaterialSTEEL COMP E52100 INNER MEMBER
Surface TreatmentCADMIUM OUTER RACE MEMBER
Outer Member Width0.3725 INCHES NOMINAL IN
Inner Member Width0.4950 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN
MaterialCOPPER ALLOY RACE INSERT
MaterialSTEEL OUTER RACE MEMBER
Lubrication FeatureGROOVE INTERNAL OUTER MEMBER
Lubrication FeatureGROOVE EXTERNAL OUTER MEMBER
Bore Diameter0.3745 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
Lubrication FeaturePERFORATION OUTER RACE MEMBER
Hardness Rating60.0 ROCKWELL C NOMINAL INNER MEMBER
Outer Member Outside Diameter0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
2920-00-179-550630547A INTERCHANGEABLE
Contact Set,distributor
Hoffco/comet Industries, Inc Dba Comet Industries Div
6665-00-663-8073 INTERCHANGEABLE
Holder,radiac Sample
Cross-Reference Index
Part NumberManufacturer
LS6 PRIMARY Roller Bearing Company of America, Inc. (USA)
LS6MILG3278 Roller Bearing Company of America, Inc. (USA)
000993-994-1 Warner Robins Air Logistics Center (USA)
9090408 Us Army Aviation and Missile Command (USA)
Related Parts
2920-00-179-5506INTERCHANGEABLE
CONTACT SET,DISTRIBUTOR
30547A
6665-00-663-8073INTERCHANGEABLE
HOLDER,RADIAC SAMPLE

Frequently Asked Questions

What is NSN 3120-00-662-1974?

NSN 3120-00-662-1974 is a Bearing,plain,self-Aligning, manufactured by Roller Bearing Company of America, Inc., classified under FSC 3120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3120-00-662-1974?

NSN 3120-00-662-1974 has 4 cross-referenced part numbers: LS6 (Roller Bearing Company of America, Inc.), LS6MILG3278 (Roller Bearing Company of America, Inc.), 000993-994-1 (Warner Robins Air Logistics Center), 9090408 (Us Army Aviation and Missile Command).

What NSN replaces 3120-00-662-1974?

There are 2 known substitutes for 3120-00-662-1974: 2920-00-179-5506, 6665-00-663-8073. Verify interchangeability with system specifications before substitution.

What are the specifications of LS6?

Key specifications for LS6: Style Designator: WITH INSERT AND/OR LINER; Material: STEEL COMP E52100 INNER MEMBER; Surface Treatment: CADMIUM OUTER RACE MEMBER; Outer Member Width: 0.3725 INCHES NOMINAL IN. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3120-00-662-1974 still in active supply?

NSN 3120-00-662-1974 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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