The Gearshaft,helical, cataloged under National Stock Number 3040-00-077-1241, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-077-1241 |
| Item Name | Gearshaft,helical |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Material | STEEL |
| Shaft Largest Diameter | 1.343 INCHES NOMINAL IN |
| Shaft End Size | 0.671 INCHES AND 0.750 INCHES IN |
| Teeth Quantity | 18 |
| Tooth Direction | LEFT |
| Teeth Type | SINGLE HELIX |
| Gear Outside Diameter | 1.343 INCHES NOMINAL IN |
| Gear Material | STEEL |
| Shaft Length | 3.313 INCHES NOMINAL IN |
| Shaft End Type | KEYWAY FLAT |
| Gear Location on Shaft | MIDPOINT BETWEEN ENDS OF SHAFT |
| Face Width | 1.437 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 |
| Reference | Meaning |
|---|---|
| 128379 | 3/9 Design control — primary reference Emerson Electric Co U S Electrical Motors Div |
| 760-41-271 | 5/9 Secondary reference Emerson Electric Co U S Electrical Motors Div |
NSN 3040-00-077-1241 is a Gearshaft,helical, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 2530-01-135-7652. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-00-077-1241: Shaft Type: SHOULDERED; Shaft Material: STEEL; Shaft Largest Diameter: 1.343 INCHES NOMINAL IN; Shaft End Size: 0.671 INCHES AND 0.750 INCHES IN. 13 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.