The Gear,helical, cataloged under National Stock Number 3020-01-251-4514, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Lake Shore Systems, Inc.. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 3020-01-251-4514 |
| Primary Part Number | 1147142 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Teeth Quantity | 30 |
| Nominal Outside Diameter | 5.500 INCHES IN |
| Material | STEEL OVERALL |
| Face Nominal Width | 3.000 INCHES 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 |
|---|---|
| 1147142 PRIMARY | Lake Shore Systems, Inc. (USA) |
NSN 3020-01-251-4514 is a Gear,helical, manufactured by Lake Shore Systems, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-251-4514 has 1 manufacturer part number on file: 1147142 (Lake Shore Systems, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-253-9729. Verify interchangeability with system specifications before substitution.
Key specifications for 1147142: Teeth Quantity: 30; Nominal Outside Diameter: 5.500 INCHES IN; Material: STEEL OVERALL; Face Nominal Width: 3.000 INCHES IN. 4 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.