The Bushing,sleeve, cataloged under National Stock Number 3120-01-288-2146, 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 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-288-2146 |
| Primary Part Number | LD137-0008-6012 |
| Item Name | Bushing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE RIGHT END SURFACE OF BODY |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OUTSIDE DIAMETER SURFACE OF BODY |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE LEFT END SURFACE OF BODY AND FLANGE |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OUTSIDE DIAMETER SURFACE OF FLANGE |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE RIGHT END SURFACE OF LEFT FLANGE |
| Flange Outside Diameter | 0.7500 INCHES NOMINAL IN |
| Body Outside Diameter | 0.6260 INCHES MINIMUM AND 0.6270 INCHES MAXIMUM IN |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Material Document and Classification | MIL-T-6736,COND H MIL SPEC 1ST MATERIAL RESPONSE OR AMS6372 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.4995 INCHES MINIMUM AND 0.5005 INCHES MAXIMUM IN |
| Specification/standard Data | 43999-LD137-0008 MANUFACTURERS STANDARD |
| Surface Treatment | CADMIUM AND CHROMATE OUTSIDE DIAMETER SURFACE OF BODY |
| Surface Treatment | CADMIUM AND CHROMATE RIGHT END SURFACE OF BODY |
| Surface Treatment | CADMIUM AND CHROMATE LEFT END SURFACE OF BODY AND FLANGE |
| Surface Treatment | CADMIUM AND CHROMATE OUTSIDE DIAMETER SURFACE OF FLANGE |
| Surface Treatment | CADMIUM AND CHROMATE RIGHT END SURFACE OF LEFT FLANGE |
| Flange Width | 0.0570 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN |
| Material | STEEL COMP 4130 OR STEEL COMP 4135 OVERALL |
| 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 |
|---|---|
| LD137-0008-6012 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
| Reference | Meaning |
|---|---|
| 4B20S8-012 | 5/9 Secondary reference The Boeing Company Div Legacy Am&m |
NSN 3120-01-288-2146 is a Bushing,sleeve, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-288-2146 has 1 manufacturer part number on file: LD137-0008-6012 (The Boeing Company Div Legacy Am&m).
Key specifications for LD137-0008-6012: Corner Shape: SQUARE ALL CORNERS; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE RIGHT END SURFACE OF BODY; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OUTSIDE DIAMETER SURFACE OF BODY; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE LEFT END SURFACE OF BODY AND FLANGE. 19 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.