The Shaft,shouldered, cataloged under National Stock Number 3040-01-290-3864, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-290-3864 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Step Quantity | 3 |
| First End Diameter | 0.9880 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.9950 INCHES NOMINAL IN |
| Largest Step Diameter | 1.315 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE |
| First End Spline Length | 2.5000 INCHES NOMINAL IN |
| First End Spline Quantity | 10 |
| End Similarity | IDENTICAL |
| First End Spline Minor Diameter | 0.8520 INCHES NOMINAL IN |
| Material | COPPER ALLOY OR NICKEL ALLOY |
| 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 |
|---|---|
| 505-4457352 ITEM 8 | 3/2 Design control — primary reference U.S. Government activity |
| 7501-25 ITEM 8 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 505-4457352 | D/9 Drawing number reference only U.S. Government activity |
NSN 3040-01-290-3864 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3040-01-345-3955. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-290-3864: Step Quantity: 3; First End Diameter: 0.9880 INCHES NOMINAL IN; First End Spline Major Diameter: 0.9950 INCHES NOMINAL IN; Largest Step Diameter: 1.315 INCHES NOMINAL IN. 11 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.