The Shaft,shouldered, cataloged under National Stock Number 3040-01-145-5583, 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14 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-145-5583 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| Step Quantity | 2 |
| First End Diameter | 0.7370 INCHES MINIMUM AND 0.7380 INCHES MAXIMUM IN |
| First End Flat Depth | 0.1170 INCHES MINIMUM AND 0.1180 INCHES MAXIMUM IN |
| Second End Diameter | 0.4890 INCHES MINIMUM AND 0.4900 INCHES MAXIMUM IN |
| Second End Step Length | 0.530 INCHES NOMINAL IN |
| Largest Step Diameter | 0.737 INCHES MINIMUM AND 0.738 INCHES MAXIMUM IN |
| First End Style | FLATTED |
| Material Document and Classification | QQ-N-281,CLASS B,FORM 1 FED SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| Second End Style | SQUARE (ROUND CORNERS) |
| First End Flat Length | 0.310 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Second End Width Across Flats | 0.372 INCHES MINIMUM AND 0.373 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 |
| Reference | Meaning |
|---|---|
| 600-4789163 | D/9 Drawing number reference only U.S. Government activity |
| 87539-3704 ITEM 9 | 3/2 Design control — primary reference U.S. Government activity |
| 600-4789341 | D/9 Drawing number reference only U.S. Government activity |
| 87539-3704 | D/9 Drawing number reference only U.S. Government activity |
| 87539-3704 ITEM 9 | 5/9 Secondary reference Drw Mfg Co |
| 600-4789163 ITEM 9 | 5/2 Secondary reference U.S. Government activity |
| 600-4789341 ITEM 9 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-01-145-5583 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 3950-01-145-7668, 5340-01-154-9700, 3040-01-211-7213. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-145-5583: Surface Finish: 63.0 MICROINCHES; Step Quantity: 2; First End Diameter: 0.7370 INCHES MINIMUM AND 0.7380 INCHES MAXIMUM IN; First End Flat Depth: 0.1170 INCHES MINIMUM AND 0.1180 INCHES MAXIMUM 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.