The Shaft,shouldered, cataloged under National Stock Number 3040-01-178-6502, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-178-6502 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES |
| Second End Hole Diameter | 0.2500 INCHES NOMINAL IN |
| Step Quantity | 7 |
| First End Diameter | 0.3750 INCHES NOMINAL IN |
| Second End Diameter | 0.6250 INCHES NOMINAL IN |
| Largest Step Diameter | 0.6250 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Material Document and Classification | QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Distance From Hole Center to End | 0.312 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | UNTHREADED CROSS DRILLED |
| Material | STEEL COMP 1020 |
| 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 |
|---|---|
| 323B535 | D/9 Drawing number reference only General Electric Co Naval and Drive Turbine Systems Dept |
| 323B535-4 | 3/9 Design control — primary reference General Electric Co Naval and Drive Turbine Systems Dept |
| 323B535P4 | C/1 Advisory reference — outside the item-of-supply concept General Electric Co Naval and Drive Turbine Systems Dept |
| 3294720 PIECE 9 | 5/9 Secondary reference General Electric Co Naval and Drive Turbine Systems Dept |
NSN 3040-01-178-6502 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): 3040-01-183-4683. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-178-6502: Surface Finish: 32.0 MICROINCHES; Second End Hole Diameter: 0.2500 INCHES NOMINAL IN; Step Quantity: 7; First End Diameter: 0.3750 INCHES NOMINAL IN. 12 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.