The Shaft,shouldered, cataloged under National Stock Number 3040-01-285-1369, 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14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-285-1369 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES |
| Second End External Thread Length | 0.625 INCHES NOMINAL IN |
| Step Quantity | 5 |
| First End Diameter | 1.7775 INCHES NOMINAL IN |
| Second End Diameter | 0.6250 INCHES NOMINAL IN |
| Largest Step Diameter | 1.250 INCHES NOMINAL IN |
| First End Style | FLAT KEYWAY |
| Material Document and Classification | MIL-S-1222,TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.0781 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNAL THREADED |
| Material | STEEL |
| External Keyway Length | 0.5625 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.1875 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 |
|---|---|
| 6110-124 ITEM 5 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 4553739 | D/9 Drawing number reference only U.S. Government activity |
| 4553739 ITEM 5 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-285-1369 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): 3040-01-285-1370. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-285-1369: Surface Finish: 32.0 MICROINCHES; Second End External Thread Length: 0.625 INCHES NOMINAL IN; Step Quantity: 5; First End Diameter: 1.7775 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.