The Shaft,shouldered, cataloged under National Stock Number 3040-01-566-0669, 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 12 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 | 3040-01-566-0669 |
| Primary Part Number | 7251555 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| First End Width Across Flats | 0.990 INCHES NOMINAL IN |
| Step Quantity | 3 |
| First End Diameter | 1.0000 INCHES NOMINAL IN |
| First End Step Length | 4.813 INCHES NOMINAL IN |
| Second End Diameter | 0.8440 INCHES NOMINAL IN |
| Second End Step Length | 1.625 INCHES NOMINAL IN |
| Largest Step Diameter | 1.750 INCHES NOMINAL IN |
| First End Style | HEXAGONAL |
| Material Document and Classification | A 322 ASSN STD ALL MATERIAL RESPONSES |
| End Similarity | NOT IDENTICAL |
| Material | STEEL |
| Second End Width Across Flats | 0.844 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7251555 PRIMARY | Naval Sea Systems Command (USA) |
NSN 3040-01-566-0669 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-566-0669 has 1 manufacturer part number on file: 7251555 (Naval Sea Systems Command).
Key specifications for 7251555: First End Width Across Flats: 0.990 INCHES NOMINAL IN; Step Quantity: 3; First End Diameter: 1.0000 INCHES NOMINAL IN; First End Step Length: 4.813 INCHES NOMINAL IN. 12 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.
NSN 3040-01-566-0669 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.