The Bushing,sleeve, cataloged under National Stock Number 3120-01-302-9506, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Mayday Manufacturing Co.. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-302-9506 |
| Primary Part Number | 4M139C4-08 |
| Item Name | Bushing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Mayday Manufacturing Co. |
| Status | ACTIVE |
| 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 |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| 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 |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.2435 INCHES MINIMUM AND 0.2450 INCHES MAXIMUM IN |
| Specification/standard Data | 76301-4-139 MANUFACTURERS STANDARD |
| Surface Treatment | PASSIVATE OVERALL |
| Flange Width | 0.0600 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN |
| Material | STEEL COMP 630 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 |
|---|---|
| 4M139C4-08 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 4M139C4-08 PRIMARY | Mayday Manufacturing Co. (USA) |
| 4M139C4-08 PRIMARY | All Power Manufacturing Co. (USA) |
| 4M139C4-08 PRIMARY | Avalon Machine Products Inc (USA) |
| 4M139C4-08 | Anixter Inc. Dba Anixter (USA) |
| Reference | Meaning |
|---|---|
| 4M139C4-08 | 3/2 Design control — primary reference U.S. Government activity |
| 4M139C4-08 | 5/9 Secondary reference Align Aerospace Llc |
| 4M139C4-08 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 3120-01-302-9506 is a Bushing,sleeve, manufactured by Mayday Manufacturing Co., classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-302-9506 has 5 manufacturer part numbers on file: 4M139C4-08 (Reid Products Inc. Dba Reid Products Inc), 4M139C4-08 (Mayday Manufacturing Co.), 4M139C4-08 (All Power Manufacturing Co.), 4M139C4-08 (Avalon Machine Products Inc), 4M139C4-08 (Anixter Inc. Dba Anixter).
Key specifications for 4M139C4-08: 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. 16 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.