The Gearshaft,spur, cataloged under National Stock Number 3040-01-449-0153, 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 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-449-0153 |
| Primary Part Number | 2D1-03977 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Material | STEEL COMP 4820 |
| Shaft Largest Diameter | 4.000 INCHES NOMINAL IN |
| Shaft End Size | 3.348 INCHES IN |
| Teeth Quantity | 23 |
| Diametral Pitch | 4 |
| Gear Outside Diameter | 6.240 INCHES MINIMUM AND 6.250 INCHES MAXIMUM IN |
| Longer Shaft Segment Length | 9.125 INCHES NOMINAL IN |
| Hardness Rating | 55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM TEETH |
| Gear Material | STEEL COMP 4820 |
| Shaft End Type | PLAIN |
| Gear Location on Shaft | OFF CENTER BETWEEN ENDS OF SHAFT |
| Pressure Angle | 25.0000 DEGREES |
| Face Width | 4.250 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 |
|---|---|
| 2D1-03977 PRIMARY | Lake Shore Systems, Inc. (USA) |
| 2D3-00293 IT NO 3 | Lake Shore Systems, Inc. (USA) |
NSN 3040-01-449-0153 is a Gearshaft,spur, manufactured by Lake Shore Systems, Inc., classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-449-0153 has 2 manufacturer part numbers on file: 2D1-03977 (Lake Shore Systems, Inc.), 2D3-00293 IT NO 3 (Lake Shore Systems, Inc.).
Key specifications for 2D1-03977: Shaft Type: SHOULDERED; Shaft Material: STEEL COMP 4820; Shaft Largest Diameter: 4.000 INCHES NOMINAL IN; Shaft End Size: 3.348 INCHES IN. 14 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.