The Bushing,sleeve, cataloged under National Stock Number 3120-01-161-9136, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 13 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-161-9136 |
| Primary Part Number | 523-5256781 PIECE 41 |
| Item Name | Bushing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES OVERALL |
| Corner Shape | SQUARE ALL CORNERS |
| Flange Outside Diameter | 4.7450 INCHES MINIMUM AND 4.7460 INCHES MAXIMUM IN |
| Body Outside Diameter | 3.7490 INCHES MINIMUM AND 3.7500 INCHES MAXIMUM IN |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Material Document and Classification | MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 3.4040 INCHES MINIMUM AND 3.4080 INCHES MAXIMUM IN |
| Lubricant Accommodation Style | GROOVED CIRCULAR |
| Antirotation/lubrication Type and Quantity | 1 HOLE |
| Flange Width | 0.2515 INCHES NOMINAL IN |
| Material | COPPER ALLOY 922 OVERALL |
| Surface Groove Location and Quantity | 2 INTERNAL |
| Hole Diameter | 0.1250 INCHES NOMINAL 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 |
|---|---|
| 523-5256781 PIECE 41 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 523-5256781 DETAIL 15-B | 5/9 Secondary reference Naval Sea Systems Command |
| 5256781 PIECE 41 | 5/9 Secondary reference U.S. Government activity |
| 523-5256781-41 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 3120-01-161-9136 is a Bushing,sleeve, manufactured by Naval Sea Systems Command, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-161-9136 has 1 manufacturer part number on file: 523-5256781 PIECE 41 (Naval Sea Systems Command).
Key specifications for 523-5256781 PIECE 41: Surface Finish: 125.0 MICROINCHES OVERALL; Corner Shape: SQUARE ALL CORNERS; Flange Outside Diameter: 4.7450 INCHES MINIMUM AND 4.7460 INCHES MAXIMUM IN; Body Outside Diameter: 3.7490 INCHES MINIMUM AND 3.7500 INCHES MAXIMUM IN. 13 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.