The Gearshaft,helical, cataloged under National Stock Number 3040-00-604-9771, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-604-9771 |
| Primary Part Number | 1655742 |
| Item Name | Gearshaft,helical |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Material | STEEL COMP 4150 |
| Helix Angle | 15.0000 DEGREES |
| Shaft Largest Diameter | 2.875 INCHES NOMINAL IN |
| Shaft End Size | 2.360 INCHES AND 2.376 INCHES IN |
| Teeth Quantity | 16 |
| Tooth Direction | LEFT |
| Diametral Pitch | 5 |
| Teeth Type | SINGLE HELIX |
| Gear Outside Diameter | 3.632 INCHES NOMINAL IN |
| Longer Shaft Segment Length | 6.062 INCHES NOMINAL IN |
| Gear Material | STEEL COMP 4150 |
| Shaft Length | 8.562 INCHES NOMINAL IN |
| Shaft End Type | PLAIN AND THREADED EXTERNAL |
| Gear Location on Shaft | OFF CENTER BETWEEN ENDS OF SHAFT |
| Pressure Angle | 20.0000 DEGREES |
| Face Width | 2.250 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 |
|---|---|
| 1655742 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| BUWEPSDWG1655742 | 5/9 Secondary reference Gulf Coast Holdings, Inc Dba Unidynamics |
| BUWEPSDWG1655742 | 5/9 Secondary reference U.S. Government activity |
| BUWEPSDWG1655742 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-00-604-9771 is a Gearshaft,helical, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-604-9771 has 1 manufacturer part number on file: 1655742 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 1655742: Shaft Type: SHOULDERED; Shaft Material: STEEL COMP 4150; Helix Angle: 15.0000 DEGREES; Shaft Largest Diameter: 2.875 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.