The Shaft,shouldered, cataloged under National Stock Number 3040-01-444-4341, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-444-4341 |
| Primary Part Number | 6111404-C2 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| First End Width Across Flats | 1.000 INCHES NOMINAL IN |
| Second End Hole Diameter | 0.2500 INCHES NOMINAL IN |
| Second End External Thread Length | 1.180 INCHES NOMINAL IN |
| Step Quantity | 6 |
| First End Diameter | 2.5000 INCHES NOMINAL IN |
| First End Step Length | 2.1360 INCHES NOMINAL IN |
| Second End Diameter | 0.8750 INCHES NOMINAL IN |
| Largest Step Diameter | 2.500 INCHES NOMINAL IN |
| First End Style | SQUARE (ROUND CORNERS) |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Distance From Hole Center to End | 0.4415 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | CROSS DRILLED AND EXTERNALLY THREADED |
| Material | NICKEL ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 6111404-C2 | Naval Sea Systems Command (USA) |
| 581-6405751 FIND AHCA C2 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| DF2011-237 FIND AHCA C2 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6405751 | D/9 Drawing number reference only Naval Sea Systems Command |
| C611-1404 FIND AHCA C2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-444-4341 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-444-4341 has 2 manufacturer part numbers on file: 6111404-C2 (Naval Sea Systems Command), 581-6405751 FIND AHCA C2 (Naval Sea Systems Command).
4 possible matches (shared part number, not a government interchangeability claim): 3040-01-444-4373, 3040-01-450-3108, 3010-01-494-7397. Verify interchangeability with system specifications before substitution.
Key specifications for 6111404-C2: Surface Finish: 63.0 MICROINCHES; First End Width Across Flats: 1.000 INCHES NOMINAL IN; Second End Hole Diameter: 0.2500 INCHES NOMINAL IN; Second End External Thread Length: 1.180 INCHES NOMINAL IN. 15 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.