The Bearing,sleeve, cataloged under National Stock Number 3120-01-024-3418, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Rbc Transport Dynamics Corp Div Rbc Transport Dynamics. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-024-3418 |
| Primary Part Number | GB528BC1 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Rbc Transport Dynamics Corp Div Rbc Transport Dynamics |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY |
| Surface Finish | 125.0 MICROINCHES RIGHT END SURFACE OF LEFT FLANGE |
| Surface Finish | 125.0 MICROINCHES RIGHT END SURFACE OF BODY |
| Corner Shape | SQUARE INSIDE RIGHT CORNER |
| Corner Shape | SQUARE LEFT FLANGE BODY CORNER |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Flange Outside Diameter | 1.5000 INCHES NOMINAL IN |
| Body Outside Diameter | 0.9950 INCHES MINIMUM AND 0.9980 INCHES MAXIMUM IN |
| Hardness Rating | 27.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OUTER LAYER |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Body Inside Diameter | 0.6480 INCHES MINIMUM AND 0.6490 INCHES MAXIMUM IN |
| Flange Width | 0.1000 INCHES MINIMUM AND 0.1100 INCHES MAXIMUM IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE INNER LAYER |
| Material | STEEL UNS J03504 OUTER LAYER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| GB528BC1 PRIMARY | Rbc Transport Dynamics Corp Div Rbc Transport Dynamics (USA) |
| GB528BC1 PRIMARY | New Hampshire Ball Bearings Inc Div Astro Division (USA) |
| Reference | Meaning |
|---|---|
| GB528BC1 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| 91039 | 5/1 Secondary reference Rbc Transport Dynamics Corp Div Rbc Transport Dynamics |
| ATLF10-104 | 5/1 Secondary reference New Hampshire Ball Bearings Inc Div Astro Division |
NSN 3120-01-024-3418 is a Bearing,sleeve, manufactured by Rbc Transport Dynamics Corp Div Rbc Transport Dynamics, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-024-3418 has 2 manufacturer part numbers on file: GB528BC1 (Rbc Transport Dynamics Corp Div Rbc Transport Dynamics), GB528BC1 (New Hampshire Ball Bearings Inc Div Astro Division).
1 possible match (shared part number, not a government interchangeability claim): 4110-01-537-3158. Verify interchangeability with system specifications before substitution.
Key specifications for GB528BC1: Surface Finish: 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY; Surface Finish: 125.0 MICROINCHES RIGHT END SURFACE OF LEFT FLANGE; Surface Finish: 125.0 MICROINCHES RIGHT END SURFACE OF BODY; Corner Shape: SQUARE INSIDE RIGHT CORNER. 17 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.