The Bearing,sleeve, cataloged under National Stock Number 3120-01-308-4286, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is The Boeing Company Div Legacy Am&m. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-308-4286 |
| Primary Part Number | LD131-0028-0604 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY |
| Surface Finish | 32.0 MICROINCHES LEFT END SURFACE OF FLANGE |
| Corner Shape | SQUARE INSIDE RIGHT 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 |
| Corner Shape | UNDERCUT LEFT FLANGE BODY CORNER |
| Flange Outside Diameter | 0.6250 INCHES NOMINAL IN |
| Body Outside Diameter | 0.5007 INCHES MINIMUM AND 0.5012 INCHES MAXIMUM IN |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE INNER LAYER |
| Material Document and Classification | LD0140-003,CAGEC 43999 MFR REF SINGLE MATERIAL RESPONSE OUTER LAYER |
| Body Inside Diameter | 0.3755 INCHES MINIMUM AND 0.3765 INCHES MAXIMUM IN |
| Specification/standard Data | 43999-LD131-0028 MANUFACTURERS STANDARD |
| Flange Width | 0.0610 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE OUTER 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 |
|---|---|
| LD131-0028-0604 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
NSN 3120-01-308-4286 is a Bearing,sleeve, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-308-4286 has 1 manufacturer part number on file: LD131-0028-0604 (The Boeing Company Div Legacy Am&m).
Key specifications for LD131-0028-0604: Surface Finish: 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY; Surface Finish: 32.0 MICROINCHES LEFT END SURFACE OF FLANGE; Corner Shape: SQUARE INSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE RIGHT CORNER. 18 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.