The Shaft,shouldered, cataloged under National Stock Number 3040-01-178-7030, 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14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-178-7030 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 16.0 MICROINCHES |
| Second End External Thread Length | 0.875 INCHES NOMINAL IN |
| Step Quantity | 6 |
| First End Diameter | 1.4965 INCHES MINIMUM AND 1.4970 INCHES MAXIMUM IN |
| First End Distance From Keyway Center to End | 5.001 INCHES NOMINAL IN |
| Second End Diameter | 1.0000 INCHES NOMINAL IN |
| Largest Step Diameter | 1.746 INCHES MINIMUM AND 1.747 INCHES MAXIMUM IN |
| First End Style | WOODRUFF KEYWAY |
| Material Document and Classification | QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNAL THREADED |
| Material | STEEL COMP 1045 |
| External Keyway Length | 3.750 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.2450 INCHES MINIMUM AND 0.2470 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 |
|---|---|
| 626E532 PIECE 4 | 5/9 Secondary reference General Electric Co Naval and Drive Turbine Systems Dept |
| 736B501-1 | 3/9 Design control — primary reference General Electric Co Naval and Drive Turbine Systems Dept |
| 736B501 | D/9 Drawing number reference only General Electric Company |
NSN 3040-01-178-7030 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): 3040-01-178-7031. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-178-7030: Surface Finish: 16.0 MICROINCHES; Second End External Thread Length: 0.875 INCHES NOMINAL IN; Step Quantity: 6; First End Diameter: 1.4965 INCHES MINIMUM AND 1.4970 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.