The Shaft,shouldered, cataloged under National Stock Number 3040-01-159-3021, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-159-3021 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| Step Quantity | 3 |
| First End Diameter | 0.8090 INCHES MINIMUM AND 0.8110 INCHES MAXIMUM IN |
| Second End Diameter | 2.0000 INCHES NOMINAL IN |
| Second End Step Length | 1.000 INCHES NOMINAL IN |
| Largest Step Diameter | 2.000 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Material Document and Classification | QQ-N-288,CLASS A FED SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| Second End Style | SQUARE (ROUND CORNERS) |
| Material | NICKEL ALLOY |
| Second End Width Across Flats | 0.750 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 |
| Reference | Meaning |
|---|---|
| 609-4676624 ITEM 4 | 5/2 Secondary reference U.S. Government activity |
| 87577-3304 ITEM 4 | 3/2 Design control — primary reference U.S. Government activity |
| 87577-3304 | D/9 Drawing number reference only U.S. Government activity |
| 609-4676624 ITE | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 609-4676624 | D/9 Drawing number reference only U.S. Government activity |
NSN 3040-01-159-3021 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-159-3021: Surface Finish: 63.0 MICROINCHES; Step Quantity: 3; First End Diameter: 0.8090 INCHES MINIMUM AND 0.8110 INCHES MAXIMUM IN; Second End Diameter: 2.0000 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.
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.