The Shaft,shouldered, cataloged under National Stock Number 3040-01-346-9839, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-346-9839 |
| Primary Part Number | 6579655 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Second End Hole Diameter | 0.1890 INCHES MINIMUM AND 0.1960 INCHES MAXIMUM IN |
| Step Quantity | 2 |
| First End Diameter | 1.6750 INCHES MINIMUM AND 1.6800 INCHES MAXIMUM IN |
| Second End Diameter | 1.2400 INCHES MINIMUM AND 1.2460 INCHES MAXIMUM IN |
| Largest Step Diameter | 1.675 INCHES MINIMUM AND 1.680 INCHES MAXIMUM IN |
| First End Style | PLAIN |
| Material Document and Classification | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Distance From Hole Center to End | 1.7300 INCHES MINIMUM AND 1.7700 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | CROSS DRILLED HOLE AND INTERNALLY THREADED |
| Material | STEEL COMP 303 OR STEEL COMP 304 |
| Second End Internal Thread Length | 2.0000 INCHES NOMINAL 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 |
|---|---|
| 6579655 PRIMARY | Naval Sea Systems Command (USA) |
NSN 3040-01-346-9839 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-346-9839 has 1 manufacturer part number on file: 6579655 (Naval Sea Systems Command).
Key specifications for 6579655: Surface Finish: 125.0 MICROINCHES; Second End Hole Diameter: 0.1890 INCHES MINIMUM AND 0.1960 INCHES MAXIMUM IN; Step Quantity: 2; First End Diameter: 1.6750 INCHES MINIMUM AND 1.6800 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.