The Gearshaft,helical, cataloged under National Stock Number 3040-01-413-8917, 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 17 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-413-8917 |
| Primary Part Number | 845-6603122 |
| Item Name | Gearshaft,helical |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Material | STEEL COMP 4140 OR STEEL COMP 4142 |
| Helix Angle | 6.1702 DEGREES |
| Shaft Largest Diameter | 1.125 INCHES NOMINAL IN |
| Shaft End Size | 0.781 INCHES IN |
| Teeth Quantity | 16 |
| Tooth Direction | LEFT |
| Diametral Pitch | A14 |
| Teeth Type | SINGLE HELIX |
| Gear Outside Diameter | 1.282 INCHES MINIMUM AND 1.286 INCHES MAXIMUM IN |
| Longer Shaft Segment Length | 6.480 INCHES NOMINAL IN |
| Gear Material | STEEL COMP 4140 OR STEEL COMP 4142 |
| Shaft Length | 14.190 INCHES NOMINAL IN |
| Shaft End Type | KEYWAY FLAT, THREADED EXTERNAL |
| Gear Location on Shaft | OFF CENTER BETWEEN ENDS OF SHAFT |
| Pressure Angle | 20.0000 DEGREES |
| Face Width | 1.980 INCHES MINIMUM AND 2.020 INCHES MAXIMUM 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 |
|---|---|
| 845-6603141-165 | Naval Sea Systems Command (USA) |
| 845-6603122 PRIMARY | Naval Sea Systems Command (USA) |
NSN 3040-01-413-8917 is a Gearshaft,helical, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-413-8917 has 2 manufacturer part numbers on file: 845-6603141-165 (Naval Sea Systems Command), 845-6603122 (Naval Sea Systems Command).
Key specifications for 845-6603122: Shaft Type: SHOULDERED; Shaft Material: STEEL COMP 4140 OR STEEL COMP 4142; Helix Angle: 6.1702 DEGREES; Shaft Largest Diameter: 1.125 INCHES NOMINAL IN. 17 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.