PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

GB528BM1-012Bearing,sleeve

New Hampshire Ball Bearings Inc Div Astro Division · NSN 3120-01-043-5881 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-01-043-5881 — this item is cataloged by the U.S. Government under National Stock Number 3120-01-043-5881. Primary manufacturer part number: GB528BM1-012.
Features
  • Bearing,sleeve — FSC 3120
  • Corner Shape: SQUARE INSIDE LEFT CORNER
  • Corner Shape: SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
  • Material: STEEL COMP 630 OUTER LAYER
  • Surface Finish: 16.0 MICROINCHES LEFT END SURFACE OF BODY AND FLANGE
  • Surface Finish: 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
  • Corner Shape: SQUARE OUTSIDE LEFT CORNER
  • Corner Shape: UNDERCUT LEFT FLANGE BODY CORNER
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Comp 630 Outer Layer construction
General Description

The Bearing,sleeve, cataloged under National Stock Number 3120-01-043-5881, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is New Hampshire Ball Bearings Inc Div Astro Division. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-01-043-5881
Primary Part NumberGB528BM1-012
Item NameBearing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerNew Hampshire Ball Bearings Inc Div Astro Division
StatusACTIVE
Corner ShapeSQUARE INSIDE LEFT CORNER
Corner ShapeSQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
MaterialSTEEL COMP 630 OUTER LAYER
Surface Finish16.0 MICROINCHES LEFT END SURFACE OF BODY AND FLANGE
Surface Finish63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
Corner ShapeSQUARE OUTSIDE LEFT CORNER
Corner ShapeUNDERCUT LEFT FLANGE BODY CORNER
Flange Width0.0575 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM IN
Flange Outside Diameter1.2400 INCHES NOMINAL IN
Body Outside Diameter0.9388 INCHES MINIMUM AND 0.9393 INCHES MAXIMUM IN
Body Inside Diameter0.7505 INCHES MINIMUM AND 0.7515 INCHES MAXIMUM IN
Corner ShapeSQUARE OUTSIDE RIGHT CORNER
MaterialPLASTIC POLYTETRAFLUOROETHYLENE INNER LAYER
Corner ShapeSQUARE INSIDE RIGHT CORNER
Style DesignatorSOLID, EXTERNAL FLANGE ONE END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5340-01-293-5285910250-12 INTERCHANGEABLE
Cap,protective,dust and Moisture
Parker Hannifin Corporation Div Hydraulic Systems Division
Cross-Reference Index
Part NumberManufacturer
ADF12-102-012 New Hampshire Ball Bearings Inc Div Astro Division (USA)
GB528BM1-012 Northrop Grumman Systems Corporation (USA)
GB528BM1-012 PRIMARY New Hampshire Ball Bearings Inc Div Astro Division (USA)
91025-012 Rbc Transport Dynamics Corp Div Rbc Transport Dynamics (USA)
ATF12-102-012 New Hampshire Ball Bearings Inc Div Astro Division (USA)
GB528BM1-012 PRIMARY Rbc Transport Dynamics Corp Div Rbc Transport Dynamics (USA)
Related Parts
5340-01-293-5285INTERCHANGEABLE
CAP,PROTECTIVE,DUST AND MOISTURE
910250-12

Frequently Asked Questions

What is NSN 3120-01-043-5881?

NSN 3120-01-043-5881 is a Bearing,sleeve, manufactured by New Hampshire Ball Bearings Inc Div Astro Division, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-01-043-5881?

NSN 3120-01-043-5881 has 6 cross-referenced part numbers: ADF12-102-012 (New Hampshire Ball Bearings Inc Div Astro Division), GB528BM1-012 (Northrop Grumman Systems Corporation), GB528BM1-012 (New Hampshire Ball Bearings Inc Div Astro Division), 91025-012 (Rbc Transport Dynamics Corp Div Rbc Transport Dynamics), ATF12-102-012 (New Hampshire Ball Bearings Inc Div Astro Division) and 1 more.

What NSN replaces 3120-01-043-5881?

There is 1 known substitute for 3120-01-043-5881: 5340-01-293-5285. Verify interchangeability with system specifications before substitution.

What are the specifications of GB528BM1-012?

Key specifications for GB528BM1-012: Corner Shape: SQUARE INSIDE LEFT CORNER; Corner Shape: SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER; Material: STEEL COMP 630 OUTER LAYER; Surface Finish: 16.0 MICROINCHES LEFT END SURFACE OF BODY AND FLANGE. 16 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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