The Shaft,straight, cataloged under National Stock Number 3040-01-446-3675, 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 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-446-3675 |
| Primary Part Number | 512-6404653-41 |
| 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 | 0.9955 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.9955 INCHES NOMINAL IN |
| Second End Diameter | 0.9955 INCHES NOMINAL IN |
| Second End Spline Minor Diameter | 0.8525 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| Second End Spline Major Diameter | 0.9955 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-281,CL A,FORM-1,COND-CD(SR) FED SPEC SINGLE MATERIAL RESPONSE |
| First End Spline Length | 1.5000 INCHES NOMINAL IN |
| First End Spline Quantity | 10 |
| End Similarity | NOT IDENTICAL |
| Second End Spline Quantity | 10 |
| Second End Style | SPLINED (STRAIGHT) |
| First End Spline Minor Diameter | 0.8525 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Second End Spline Length | 3.5000 INCHES NOMINAL IN |
| 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 |
|---|---|
| 512-6404653-41 PRIMARY | Naval Sea Systems Command (USA) |
| 512-6404652-44 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| DF6503-175 FN 41 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6404653 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-446-3675 is a Shaft,straight, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-446-3675 has 2 manufacturer part numbers on file: 512-6404653-41 (Naval Sea Systems Command), 512-6404652-44 (Naval Sea Systems Command).
Key specifications for 512-6404653-41: Surface Finish: 125.0 MICROINCHES; First End Diameter: 0.9955 INCHES NOMINAL IN; First End Spline Major Diameter: 0.9955 INCHES NOMINAL IN; Second End Diameter: 0.9955 INCHES NOMINAL IN. 16 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.