The Shaft,shouldered, cataloged under National Stock Number 3040-01-505-5861, 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 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-505-5861 |
| Primary Part Number | 596-7409702-9 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| Step Quantity | 7 |
| First End Diameter | 1.2495 INCHES MINIMUM AND 1.2500 INCHES MAXIMUM IN |
| First End Spline Major Diameter | 1.7500 INCHES NOMINAL IN |
| Second End Diameter | 0.7495 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN |
| Second End Step Length | 1.190 INCHES NOMINAL IN |
| Largest Step Diameter | 1.750 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| Material Document and Classification | ASTM-A564, TYPE-630, CONDITION-H1025 ASSN STD SINGLE MATERIAL RESPONSE AND ASTM-A484 ASSN STD SINGLE MATERIAL RESPONSE |
| First End Spline Length | 0.880 INCHES NOMINAL IN |
| First End Spline Quantity | 8 |
| End Similarity | NOT IDENTICAL |
| Second End Style | SQUARE (ROUND CORNERS) |
| First End Spline Minor Diameter | 1.4800 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| Second End Width Across Flats | 0.560 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 596-7409702-9 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 7409702 | D/9 Drawing number reference only Naval Sea Systems Command |
| B831-4200-9 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-01-505-5861 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-505-5861 has 1 manufacturer part number on file: 596-7409702-9 (Naval Sea Systems Command).
Key specifications for 596-7409702-9: Surface Finish: 63.0 MICROINCHES; Step Quantity: 7; First End Diameter: 1.2495 INCHES MINIMUM AND 1.2500 INCHES MAXIMUM IN; First End Spline Major Diameter: 1.7500 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.