The Bushing,sleeve, cataloged under National Stock Number 3120-01-024-4917, 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 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-024-4917 |
| Primary Part Number | ST4M166-6-1085 |
| Item Name | Bushing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Mayday Manufacturing Co. |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Body Outside Diameter | 0.4985 INCHES MINIMUM AND 0.4990 INCHES MAXIMUM IN |
| Style Designator | SOLID, PLAIN, NO OUTSIDE FLANGES |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.3750 INCHES MINIMUM AND 0.3760 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Antirotation/lubrication Type and Quantity | 2 HOLE |
| Material | STEEL COMP 630 OVERALL |
| Hole Diameter | 0.0780 INCHES MINIMUM AND 0.0830 INCHES MAXIMUM FIRST 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 |
|---|---|
| ST4M166-6-1085 PRIMARY | Mayday Manufacturing Co. (USA) |
| ST4M166-6-1085 PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST4M166-6-1085 PRIMARY | All Power Manufacturing Co. (USA) |
| ST4M166-6-1085 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| ST4M166-6-1085 | 5/9 Secondary reference Avalon Machine Products Inc |
| ST4M166-6-1085 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3120-01-024-4917 is a Bushing,sleeve, manufactured by Mayday Manufacturing Co., classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-024-4917 has 4 manufacturer part numbers on file: ST4M166-6-1085 (Mayday Manufacturing Co.), ST4M166-6-1085 (Reid Products Inc. Dba Reid Products Inc), ST4M166-6-1085 (All Power Manufacturing Co.), ST4M166-6-1085 (The Boeing Company Div Defense).
Key specifications for ST4M166-6-1085: Corner Shape: SQUARE ALL CORNERS; Body Outside Diameter: 0.4985 INCHES MINIMUM AND 0.4990 INCHES MAXIMUM IN; Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES; Material Document and Classification: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 9 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.