The Bushing,sleeve, cataloged under National Stock Number 3120-01-129-9150, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is All Power Manufacturing Co.. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3120-01-129-9150 |
| Primary Part Number | 4M139BC4-29 |
| Item Name | Bushing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | All Power Manufacturing Co. |
| Status | ACTIVE |
| Flange Outside Diameter | 0.4900 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN |
| Body Outside Diameter | 0.3766 INCHES MINIMUM AND 0.3771 INCHES MAXIMUM IN |
| Body Inside Diameter | 0.2435 INCHES MINIMUM AND 0.2450 INCHES MAXIMUM IN |
| Flange Width | 0.0600 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 4M139BC4-29 PRIMARY | All Power Manufacturing Co. (USA) |
| 4M139BC4-29 PRIMARY | Mayday Manufacturing Co. (USA) |
| 4M139BC4-29 PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| 4M139-BC4-29 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10130600 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 4M139BC4-29 | 3/2 Design control — primary reference U.S. Government activity |
| ST4M139BC4-29 | 5/9 Secondary reference The Boeing Company Div Defense |
| 4M139BC4-29 | 5/9 Secondary reference Avalon Machine Products Inc |
NSN 3120-01-129-9150 is a Bushing,sleeve, manufactured by All Power Manufacturing Co., classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-129-9150 has 4 manufacturer part numbers on file: 4M139BC4-29 (All Power Manufacturing Co.), 4M139BC4-29 (Mayday Manufacturing Co.), 4M139BC4-29 (Reid Products Inc. Dba Reid Products Inc), 4M139-BC4-29 (The Boeing Company Div Defense).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-581-8914. Verify interchangeability with system specifications before substitution.
Key specifications for 4M139BC4-29: Flange Outside Diameter: 0.4900 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN; Body Outside Diameter: 0.3766 INCHES MINIMUM AND 0.3771 INCHES MAXIMUM IN; Overall Length: 0.3450 INCHES MINIMUM AND 0.3570 INCHES MAXIMUM IN; Body Inside Diameter: 0.2435 INCHES MINIMUM AND 0.2450 INCHES MAXIMUM IN. 4 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.