The Gearshaft,spur, cataloged under National Stock Number 3040-01-293-2880, 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 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-293-2880 |
| Primary Part Number | 5B1-04449 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Shaft Material | STEEL |
| Shaft Largest Diameter | 16.938 INCHES NOMINAL IN |
| Face Width | 4.625 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 |
|---|---|
| 5B1-04449 PRIMARY | Lake Shore Systems, Inc. (USA) |
| 5D3-02042 ITEM 6 | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 5D3-02042 | D/9 Drawing number reference only Lake Shore Systems, Inc. |
NSN 3040-01-293-2880 is a Gearshaft,spur, manufactured by Lake Shore Systems, Inc., classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-293-2880 has 2 manufacturer part numbers on file: 5B1-04449 (Lake Shore Systems, Inc.), 5D3-02042 ITEM 6 (Lake Shore Systems, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-293-2881. Verify interchangeability with system specifications before substitution.
Key specifications for 5B1-04449: Shaft Material: STEEL; Shaft Largest Diameter: 16.938 INCHES NOMINAL IN; Face Width: 4.625 INCHES NOMINAL IN. 3 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.