The Bearing,sleeve, cataloged under National Stock Number 3120-00-079-3943, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-00-079-3943 |
| Primary Part Number | 6-40658-9 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY |
| Surface Finish | 32.0 MICROINCHES LEFT END SURFACE OF BODY AND FLANGE |
| Surface Finish | 125.0 MICROINCHES RIGHT END SURFACE OF LEFT FLANGE |
| Surface Finish | 125.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY |
| Surface Finish | 125.0 MICROINCHES RIGHT END SURFACE OF BODY |
| Surface Finish | 125.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF FLANGE |
| Corner Shape | SQUARE INSIDE RIGHT CORNER |
| Corner Shape | SQUARE LEFT FLANGE BODY 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 |
| Flange Outside Diameter | 0.7400 INCHES MINIMUM AND 0.7600 INCHES MAXIMUM IN |
| Body Outside Diameter | 0.5640 INCHES MINIMUM AND 0.5650 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Body Inside Diameter | 0.4310 INCHES MINIMUM AND 0.4320 INCHES MAXIMUM IN |
| Flange Width | 0.0590 INCHES MINIMUM AND 0.0610 INCHES MAXIMUM IN |
| Material | STEEL COMP E4340 AND STEEL COMP 4340 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 |
|---|---|
| 6-40658-9 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 6-40658-9 | 5/9 Secondary reference Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
| 6-40658-9 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
NSN 3120-00-079-3943 is a Bearing,sleeve, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-00-079-3943 has 1 manufacturer part number on file: 6-40658-9 (Northrop Grumman Systems Corporation).
Key specifications for 6-40658-9: Surface Finish: 125.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY; Surface Finish: 32.0 MICROINCHES LEFT END SURFACE OF BODY AND FLANGE; Surface Finish: 125.0 MICROINCHES RIGHT END SURFACE OF LEFT FLANGE; Surface Finish: 125.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY. 19 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.