PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AA521-2Bearing,sleeve

Chrysler Corp Amplex Div · NSN 3120-00-661-5757 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-661-5757 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-661-5757. Primary manufacturer part number: AA521-2.
Features
  • Bearing,sleeve — FSC 3120
  • Material: LUBRICANT LUBRICATION
  • Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES
  • Corner Shape: SQUARE ALL CORNERS
  • Material: COPPER ALLOY OVERALL
  • Body Outside Diameter: 0.5020 INCHES MINIMUM AND 0.5030 INCHES MAXIMUM IN
  • Body Inside Diameter: 0.3740 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
  • 7 verified cross-references
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Lubricant Lubrication construction
General Description

The Bearing,sleeve, cataloged under National Stock Number 3120-00-661-5757, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Chrysler Corp Amplex Div. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 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
NSN3120-00-661-5757
Primary Part NumberAA521-2
Item NameBearing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerChrysler Corp Amplex Div
StatusCANCELLED
MaterialLUBRICANT LUBRICATION
Style DesignatorSOLID, PLAIN, NO OUTSIDE FLANGES
Corner ShapeSQUARE ALL CORNERS
MaterialCOPPER ALLOY OVERALL
Body Outside Diameter0.5020 INCHES MINIMUM AND 0.5030 INCHES MAXIMUM IN
Body Inside Diameter0.3740 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
3110-00-190-931225Z112D8 INTERCHANGEABLE
Ring,bearing,inner
Morris Material Handling, Inc.
6510-01-465-9327 INTERCHANGEABLE
Exercise Bands,resi
Cross-Reference Index
Part NumberManufacturer
AA521-2 PRIMARY Chrysler Corp Amplex Div (USA)
SL371-14 Masten Bunting Eagle-Picher Bearings Div Eagle-Picher Industries Inc (USA)
YE628 White Farm Equipment Co Sub of Tic Investment Inc (USA)
AA521-2 Beemer Precision Inc (USA)
A521-2 PRIMARY Chrysler Corp Amplex Div (USA)
A521-2 PRIMARY Chrysler Realty Company Llc Dba Daimler Chrysler (USA)
AA521-2 Eagle-Picher Industries Inc Kingwell Div (USA)
Related Parts
3110-00-190-9312INTERCHANGEABLE
RING,BEARING,INNER
25Z112D8
6510-01-465-9327INTERCHANGEABLE
EXERCISE BANDS,RESI

Frequently Asked Questions

What is NSN 3120-00-661-5757?

NSN 3120-00-661-5757 is a Bearing,sleeve, manufactured by Chrysler Corp Amplex Div, classified under FSC 3120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3120-00-661-5757?

NSN 3120-00-661-5757 has 7 cross-referenced part numbers: AA521-2 (Chrysler Corp Amplex Div), SL371-14 (Masten Bunting Eagle-Picher Bearings Div Eagle-Picher Industries Inc), YE628 (White Farm Equipment Co Sub of Tic Investment Inc), AA521-2 (Beemer Precision Inc), A521-2 (Chrysler Corp Amplex Div) and 2 more.

What NSN replaces 3120-00-661-5757?

There are 2 known substitutes for 3120-00-661-5757: 3110-00-190-9312, 6510-01-465-9327. Verify interchangeability with system specifications before substitution.

What are the specifications of AA521-2?

Key specifications for AA521-2: Material: LUBRICANT LUBRICATION; Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES; Corner Shape: SQUARE ALL CORNERS; Material: COPPER ALLOY OVERALL. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3120-00-661-5757 still in active supply?

NSN 3120-00-661-5757 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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