The Shaft,shouldered, cataloged under National Stock Number 3040-01-412-0341, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-412-0341 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| Second End External Thread Length | 0.5939 INCHES NOMINAL IN |
| Step Quantity | 4 |
| First End Diameter | 0.5000 INCHES MINIMUM AND 0.5010 INCHES MAXIMUM IN |
| Second End Diameter | 0.3750 INCHES NOMINAL IN |
| Largest Step Diameter | 0.750 INCHES MAXIMUM IN |
| First End Style | PLAIN |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNAL THREADED |
| Material | STEEL COMP 304 |
| 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 |
|---|---|
| D204811G001 ITEM 20 | 5/2 Secondary reference U.S. Government activity |
| D204811G001 | D/9 Drawing number reference only U.S. Government activity |
| D204811G001-20 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-412-0341 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 2030-01-412-0694, 3020-01-412-1155, 3020-01-412-1158. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-412-0341: Surface Finish: 63.0 MICROINCHES; Second End External Thread Length: 0.5939 INCHES NOMINAL IN; Step Quantity: 4; First End Diameter: 0.5000 INCHES MINIMUM AND 0.5010 INCHES MAXIMUM IN. 10 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.