The Shaft,straight, cataloged under National Stock Number 3040-01-441-5259, 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 9 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-441-5259 |
| Primary Part Number | 581-6405750 FIND AHWA 6 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| First End Diameter | 4.4940 INCHES NOMINAL IN |
| First End Spline Major Diameter | 4.4940 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| First End Spline Length | 7.000 INCHES NOMINAL IN |
| First End Spline Quantity | 10 |
| End Similarity | IDENTICAL |
| First End Spline Minor Diameter | 4.0675 INCHES NOMINAL IN |
| 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 |
|---|---|
| 581-6405750 FIND AHWA 6 | Naval Sea Systems Command (USA) |
| 6111403-6 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| DF2011-236 FIND AHWA 6 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| C611-140 FN AHWA 6 | 3/2 Design control — primary reference U.S. Government activity |
| 581-6405750 AHWA FIND 6 | 5/9 Secondary reference Balance Research Co |
| 64057570 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-441-5259 is a Shaft,straight, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-441-5259 has 2 manufacturer part numbers on file: 581-6405750 FIND AHWA 6 (Naval Sea Systems Command), 6111403-6 (Naval Sea Systems Command).
Key specifications for 581-6405750 FIND AHWA 6: Surface Finish: 125.0 MICROINCHES; First End Diameter: 4.4940 INCHES NOMINAL IN; First End Spline Major Diameter: 4.4940 INCHES NOMINAL IN; First End Style: SPLINED (STRAIGHT). 9 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.