The Shaft,shouldered, cataloged under National Stock Number 3040-01-501-7536, 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 18 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-501-7536 |
| Primary Part Number | 6402950-1 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Second End External Thread Length | 1.660 INCHES NOMINAL IN |
| Step Quantity | 6 |
| First End Diameter | 1.0000 INCHES NOMINAL IN |
| Second End Diameter | 0.8750 INCHES NOMINAL IN |
| Largest Step Diameter | 1.125 INCHES NOMINAL IN |
| First End External Thread Length | 1.250 INCHES NOMINAL IN |
| First End Style | CIRCULAR GROOVED AND EXTERNALLY THREADED |
| Material Document and Classification | ASTM B-381 GR-F-5 ASSN STD ALL MATERIAL RESPONSES |
| Second End Groove Diameter | 0.7340 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 1.250 INCHES NOMINAL IN |
| Second End Groove Width | 0.2800 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 1.660 INCHES NOMINAL IN |
| First End Groove Diameter | 0.8420 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED AND EXTERNALLY THREADED |
| Material | TITANIUM |
| First End Groove Width | 0.3100 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 |
| Part Number | Manufacturer |
|---|---|
| 751-6402403 ITEM 51 | Naval Sea Systems Command (USA) |
| 751-6402408 ITEM 51 | Naval Sea Systems Command (USA) |
| 751-6402402 ITEM 51 | Naval Sea Systems Command (USA) |
| 751-6402405 ITME 51 | Naval Sea Systems Command (USA) |
| 6402950-1 PRIMARY | Naval Sea Systems Command (USA) |
| 751-6402406 ITEM 51 | Naval Sea Systems Command (USA) |
| 751-6402401 ITEM 51 | Naval Sea Systems Command (USA) |
| 751-6402404 ITEM 51 | Naval Sea Systems Command (USA) |
| 751-6402407 ITEM 51 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 211052081 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 3040-01-501-7536 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-501-7536 has 9 manufacturer part numbers on file: 751-6402403 ITEM 51 (Naval Sea Systems Command), 751-6402408 ITEM 51 (Naval Sea Systems Command), 751-6402402 ITEM 51 (Naval Sea Systems Command), 751-6402405 ITME 51 (Naval Sea Systems Command), 6402950-1 (Naval Sea Systems Command) and 4 more.
Key specifications for 6402950-1: Surface Finish: 125.0 MICROINCHES; Second End External Thread Length: 1.660 INCHES NOMINAL IN; Step Quantity: 6; First End Diameter: 1.0000 INCHES NOMINAL IN. 18 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.