The Gearshaft,helical, cataloged under National Stock Number 3040-00-138-2018, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-138-2018 |
| Item Name | Gearshaft,helical |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Material | STEEL |
| Helix Angle | 11.2580 DEGREES |
| Shaft Largest Diameter | 1.000 INCHES NOMINAL IN |
| Shaft End Size | 0.667 INCHES AND 0.749 INCHES IN |
| Teeth Quantity | 18 |
| Module Number | 1.148 INCHES IN |
| Tooth Direction | RIGHT |
| Diametral Pitch | 16 |
| Teeth Type | SINGLE HELIX |
| Gear Outside Diameter | 1.336 INCHES NOMINAL IN |
| Gear Material | STEEL |
| Shaft Length | 3.312 INCHES NOMINAL IN |
| Shaft End Type | PLAIN |
| Gear Location on Shaft | MIDPOINT BETWEEN ENDS OF SHAFT |
| Pressure Angle | 20.0000 DEGREES |
| Face Width | 2.016 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 |
|---|---|
| B116284 | 3/9 Design control — primary reference Emerson Electric Co U S Electrical Motors Div |
NSN 3040-00-138-2018 is a Gearshaft,helical, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-00-138-2018: Shaft Type: SHOULDERED; Shaft Material: STEEL; Helix Angle: 11.2580 DEGREES; Shaft Largest Diameter: 1.000 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.