The Bearing,sleeve, cataloged under National Stock Number 3120-01-047-0495, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is New Hampshire Ball Bearings Inc Div Astro Division. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-047-0495 |
| Primary Part Number | BACB28AB4-104 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | New Hampshire Ball Bearings Inc Div Astro Division |
| Status | ACTIVE |
| Surface Finish | 64.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY |
| Surface Finish | 32.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY |
| Corner Shape | SQUARE ALL CORNERS |
| Body Outside Diameter | 0.5620 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM OUTER LAYER |
| Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM INNER LAYER |
| Style Designator | SOLID, PLAIN, NO OUTSIDE FLANGES |
| Body Inside Diameter | 0.2495 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN |
| Lubricant Accommodation Style | GROOVED CIRCULAR |
| Surface Treatment | CADMIUM OUTER LAYER |
| Material | STEEL COMP 630 OUTER LAYER |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE INTERMEDIATE LAYER |
| Material | STEEL COMP 630 INNER 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 |
|---|---|
| BACB28AB4-104 PRIMARY | New Hampshire Ball Bearings Inc Div Astro Division (USA) |
| BACB28AB4-104 PRIMARY | Minebea Mitsumi Inc. Div Rodend-Fastener Business Unit (JPN) |
| BACB28AB4-104 PRIMARY | Roller Bearing Company of America, Inc. (USA) |
| BACB28AB4-104 PRIMARY | Rbc Transport Dynamics Corp Div Rbc Transport Dynamics (USA) |
| BACB28AB4-104 PRIMARY | Rexnord Industries, Llc Div Aerosspace Bearing Operation (USA) |
| Reference | Meaning |
|---|---|
| BACB28AB4-104 | 1/2 Source control — Government-approved source U.S. Government activity |
| 78910-04-104 | 5/1 Secondary reference Rbc Transport Dynamics Corp Div Rbc Transport Dynamics |
| BACB28AB4-104 | 5/9 Secondary reference Minebea Mitsumi Inc. |
| 107-3304-104 | 5/9 Secondary reference Rexnord Industries, Llc Div Aerosspace Bearing Operation |
| 04-228-104 | 5/1 Secondary reference New Hampshire Ball Bearings Inc Div Astro Division |
| BACB28AB4-104 | 5/9 Secondary reference New Hampshire Ball Bearings Inc Div Precision Division |
| BACB28AB4-104 | 3/2 Design control — primary reference U.S. Government activity |
| HBR284-104 | 5/1 Secondary reference Roller Bearing Company of America, Inc. |
| AJD-04-104 | 5/1 Secondary reference New Hampshire Ball Bearings Inc Div Precision Division |
NSN 3120-01-047-0495 is a Bearing,sleeve, manufactured by New Hampshire Ball Bearings Inc Div Astro Division, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-047-0495 has 5 manufacturer part numbers on file: BACB28AB4-104 (New Hampshire Ball Bearings Inc Div Astro Division), BACB28AB4-104 (Minebea Mitsumi Inc. Div Rodend-Fastener Business Unit), BACB28AB4-104 (Roller Bearing Company of America, Inc.), BACB28AB4-104 (Rbc Transport Dynamics Corp Div Rbc Transport Dynamics), BACB28AB4-104 (Rexnord Industries, Llc Div Aerosspace Bearing Operation).
Key specifications for BACB28AB4-104: Surface Finish: 64.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY; Surface Finish: 32.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY; Corner Shape: SQUARE ALL CORNERS; Body Outside Diameter: 0.5620 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN. 13 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.