The Shaft,shouldered, cataloged under National Stock Number 3040-00-841-9657, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-841-9657 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| Second End External Thread Length | 0.6750 INCHES NOMINAL IN |
| Step Quantity | 18 |
| First End Diameter | 0.6200 INCHES NOMINAL IN |
| Second End Diameter | 0.9690 INCHES NOMINAL IN |
| Largest Step Diameter | 2.900 INCHES NOMINAL IN |
| Second End Distance From Keyway Center to End | 0.310 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Keyway Width | 0.1800 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.189 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNALLY THREADED AND INDENTED FLAT KEYWAY |
| Material | STEEL |
| External Keyway Length | 0.620 INCHES NOMINAL SECOND END 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 |
|---|---|
| LTCT2431 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-00-841-9657 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-00-841-9657: Surface Finish: 63.0 MICROINCHES; Second End External Thread Length: 0.6750 INCHES NOMINAL IN; Step Quantity: 18; First End Diameter: 0.6200 INCHES NOMINAL IN. 14 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.