The Bushing,sleeve, cataloged under National Stock Number 3120-01-131-7635, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 4 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-131-7635 |
| Primary Part Number | 4M139C4-17 |
| Item Name | Bushing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | The Boeing Company Div Defense |
| 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 |
|---|---|
| 4M139C4-17 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10107982 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 4M139C4-17 | C/1 Advisory reference — outside the item-of-supply concept Avalon Machine Products Inc |
| 4M139C4-17 | C/1 Advisory reference — outside the item-of-supply concept All Power Manufacturing Co. |
| 4M139C4-17 | C/1 Advisory reference — outside the item-of-supply concept Mayday Manufacturing Co. |
| ST4M139C4-17 | 5/9 Secondary reference The Boeing Company Div Defense |
| 4M139C4-17 | C/1 Advisory reference — outside the item-of-supply concept Reid Products Inc. Dba Reid Products Inc |
| 4M139C4-17 | 5/2 Secondary reference U.S. Government activity |
NSN 3120-01-131-7635 is a Bushing,sleeve, manufactured by The Boeing Company Div Defense, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-131-7635 has 1 manufacturer part number on file: 4M139C4-17 (The Boeing Company Div Defense).
Key specifications for 4M139C4-17: 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: 0.2250 INCHES MINIMUM AND 0.2370 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.