The Bushing,sleeve, cataloged under National Stock Number 3120-01-481-9452, 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 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-481-9452 |
| Primary Part Number | 4M374BC4-030 |
| Item Name | Bushing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Surface Treatment Document and Classification | MIL-C-83488 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Flange Outside Diameter | 0.4950 INCHES MINIMUM AND 0.5150 INCHES MAXIMUM IN |
| Body Outside Diameter | 0.3732 INCHES MINIMUM AND 0.3737 INCHES MAXIMUM IN |
| Criticality Code Justification | AGAV |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Material Document and Classification | ASTM B196 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.2415 INCHES MINIMUM AND 0.2430 INCHES MAXIMUM IN |
| Surface Treatment | COPPER ALLOY OVERALL |
| Flange Width | 0.0600 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN |
| Material | COPPER ALLOY 172 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 4M374BC4-030 PRIMARY | The Boeing Company Div Defense (USA) |
| 4M374BC4-030 PRIMARY | Avalon Machine Products Inc (USA) |
| Reference | Meaning |
|---|---|
| 4M374BC4-030 | 5/1 Secondary reference Mayday Manufacturing Co. |
| 4M374BC4-030 | 5/1 Secondary reference All Power Manufacturing Co. |
NSN 3120-01-481-9452 is a Bushing,sleeve, manufactured by The Boeing Company Div Defense, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-481-9452 has 2 manufacturer part numbers on file: 4M374BC4-030 (The Boeing Company Div Defense), 4M374BC4-030 (Avalon Machine Products Inc).
Key specifications for 4M374BC4-030: Corner Shape: SQUARE ALL CORNERS; Surface Treatment Document and Classification: MIL-C-83488 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Flange Outside Diameter: 0.4950 INCHES MINIMUM AND 0.5150 INCHES MAXIMUM IN; Body Outside Diameter: 0.3732 INCHES MINIMUM AND 0.3737 INCHES MAXIMUM IN. 11 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.