The Shaft,shouldered, cataloged under National Stock Number 3040-01-398-3357, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-398-3357 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| First End Width Across Flats | 0.500 INCHES NOMINAL IN |
| Step Quantity | 3 |
| First End Diameter | 1.3750 INCHES NOMINAL IN |
| First End Step Length | 1.3800 INCHES NOMINAL IN |
| Second End Diameter | 1.2800 INCHES NOMINAL IN |
| Largest Step Diameter | 1.3200 INCHES NOMINAL IN |
| Second End Spline Minor Diameter | 1.2470 INCHES NOMINAL IN |
| First End Style | SQUARE (ROUND CORNERS) |
| Second End Spline Major Diameter | 1.3750 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Spline Quantity | 32 |
| Second End Pressure Angle | 30.0 DEGREES NOMINAL |
| Second End Style | SPLINED (INVOLUTE) |
| Material | STEEL CORROSION RESISTING |
| Second End Pitch Diameter | 1.3333 INCHES NOMINAL IN |
| Second End Spline Length | 0.450 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 |
|---|---|
| DAA7252D715-003 | 3/2 Design control — primary reference U.S. Government activity |
| DAA7252D715 | D/9 Drawing number reference only U.S. Government activity |
NSN 3040-01-398-3357 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-398-3357: First End Width Across Flats: 0.500 INCHES NOMINAL IN; Step Quantity: 3; First End Diameter: 1.3750 INCHES NOMINAL IN; First End Step Length: 1.3800 INCHES NOMINAL IN. 16 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.