The Bearing,sleeve, cataloged under National Stock Number 3120-01-042-8903, 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 11 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-042-8903 |
| Primary Part Number | AT05SS020 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | New Hampshire Ball Bearings Inc Div Astro Division |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY |
| Surface Finish | 125.0 MICROINCHES RIGHT END SURFACE OF BODY |
| Surface Finish | 125.0 MICROINCHES LEFT END SURFACE OF BODY |
| Surface Finish | 125.0 MICROINCHES INNER MEMBER |
| Corner Shape | SQUARE ALL CORNERS |
| Body Outside Diameter | 0.4381 INCHES MINIMUM AND 0.4386 INCHES MAXIMUM IN |
| Hardness Rating | 27.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OUTER LAYER |
| Style Designator | SOLID, PLAIN, NO OUTSIDE FLANGES |
| Body Inside Diameter | 0.3130 INCHES MINIMUM AND 0.3190 INCHES MAXIMUM IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE AND GLASS FIBER OR PLASTIC POLYTETRAFLUOROETHYLENE AND PLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER) INNER LAYER |
| Material | STEEL COMP 630 OR STEEL COMP 410 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 |
|---|---|
| AT05SS020 PRIMARY | New Hampshire Ball Bearings Inc Div Astro Division (USA) |
| 06-211-05-020 PRIMARY | Rbc Transport Dynamics Corp Div Rbc Transport Dynamics (USA) |
| Reference | Meaning |
|---|---|
| BJ10TH-020 | C/1 Advisory reference — outside the item-of-supply concept Rbc Aircraft Products, Inc. |
| 101-2005-020 | 5/9 Secondary reference Rexnord Industries, Llc Div Aerosspace Bearing Operation |
| GB528AU05C020 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| KJN05C020-240 | 3/2 Design control — primary reference U.S. Government activity |
| BJ10TH020 | 5/9 Secondary reference Timken Co Div the Timken Company |
NSN 3120-01-042-8903 is a Bearing,sleeve, manufactured by New Hampshire Ball Bearings Inc Div Astro Division, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-042-8903 has 2 manufacturer part numbers on file: AT05SS020 (New Hampshire Ball Bearings Inc Div Astro Division), 06-211-05-020 (Rbc Transport Dynamics Corp Div Rbc Transport Dynamics).
Key specifications for AT05SS020: Surface Finish: 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY; Surface Finish: 125.0 MICROINCHES RIGHT END SURFACE OF BODY; Surface Finish: 125.0 MICROINCHES LEFT END SURFACE OF BODY; Surface Finish: 125.0 MICROINCHES INNER MEMBER. 11 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.