The Gearshaft,spur, cataloged under National Stock Number 3040-01-445-2259, 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 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3040-01-445-2259 |
| Primary Part Number | 512-6404653-92 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Largest Diameter | 1.260 INCHES NOMINAL IN |
| Shaft End Size | 0.998 INCHES AND 0.996 INCHES IN |
| Teeth Quantity | 9 |
| Diametral Pitch | 6 |
| Gear Outside Diameter | 2.000 INCHES NOMINAL IN |
| Longer Shaft Segment Length | 8.321 INCHES NOMINAL IN |
| Shaft End Type | CROSS DRILLED UNTHREADED, THREADED INTERNAL AND SPLINED STRAIGHT |
| Gear Location on Shaft | OFF CENTER BETWEEN ENDS OF SHAFT |
| Pressure Angle | 20.0000 DEGREES |
| Face Width | 1.100 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 |
|---|---|
| 512-6404653-92 PRIMARY | Naval Sea Systems Command (USA) |
| 512-6404652-138 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6404653 | D/9 Drawing number reference only Naval Sea Systems Command |
| DF6503-175-92 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 3040-01-445-2259 is a Gearshaft,spur, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-445-2259 has 2 manufacturer part numbers on file: 512-6404653-92 (Naval Sea Systems Command), 512-6404652-138 (Naval Sea Systems Command).
Key specifications for 512-6404653-92: Shaft Type: SHOULDERED; Shaft Largest Diameter: 1.260 INCHES NOMINAL IN; Shaft End Size: 0.998 INCHES AND 0.996 INCHES IN; Teeth Quantity: 9. 11 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.