The Gearshaft,helical, cataloged under National Stock Number 3040-01-449-0750, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Lake Shore Systems, Inc.. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-449-0750 |
| Primary Part Number | 2C1-04746 |
| Item Name | Gearshaft,helical |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Material | STEEL COMP 4820 |
| Helix Angle | 15.0000 DEGREES |
| Shaft Largest Diameter | 2.562 INCHES NOMINAL IN |
| Shaft End Size | 2.002 INCHES AND 2.562 INCHES IN |
| Teeth Quantity | 17 |
| Tooth Direction | LEFT |
| Diametral Pitch | 5 |
| Teeth Type | SINGLE HELIX |
| Gear Outside Diameter | 3.910 INCHES MINIMUM AND 3.920 INCHES MAXIMUM IN |
| Longer Shaft Segment Length | 6.124 INCHES NOMINAL IN |
| Hardness Rating | 55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM TEETH |
| Gear Material | STEEL COMP 4820 |
| Shaft Length | 6.124 INCHES NOMINAL IN |
| Shaft End Type | PLAIN AND THREADED INTERNAL |
| Gear Location on Shaft | OFF CENTER BETWEEN ENDS OF SHAFT |
| Pressure Angle | 20.0000 DEGREES |
| Face Width | 3.750 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 |
|---|---|
| 2E3-00295 IT NO 1 | Lake Shore Systems, Inc. (USA) |
| 2C1-04746 PRIMARY | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2E3-00295 | D/9 Drawing number reference only Lake Shore Systems, Inc. |
NSN 3040-01-449-0750 is a Gearshaft,helical, manufactured by Lake Shore Systems, Inc., classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-449-0750 has 2 manufacturer part numbers on file: 2E3-00295 IT NO 1 (Lake Shore Systems, Inc.), 2C1-04746 (Lake Shore Systems, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 3040-01-449-0770, 3040-01-449-1704, 3110-01-500-2733. Verify interchangeability with system specifications before substitution.
Key specifications for 2C1-04746: Shaft Type: SHOULDERED; Shaft Material: STEEL COMP 4820; Helix Angle: 15.0000 DEGREES; Shaft Largest Diameter: 2.562 INCHES NOMINAL IN. 18 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.