The Gear Cluster, cataloged under National Stock Number 3020-01-063-1956, 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 Malwin Electronics Corp.. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-063-1956 |
| Primary Part Number | 1801-4000-1 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Malwin Electronics Corp. |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.0397 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Diameter | 0.0397 INCHES BETWEEN SECOND AND THIRD GEAR IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Precision Classification | QUALITY NUMBER 10 FIRST GEAR |
| Nominal Overall Length | 0.359 INCHES IN |
| Hub Style Designator | PLAIN FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Hub Nominal Length | 0.0450 INCHES SECOND END IN |
| Hub Nominal Length | 0.0540 INCHES FIRST END IN |
| Nominal Outside Diameter | 0.0906 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 0.3307 INCHES FIRST GEAR IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Construction | ASSEMBLED |
| 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 |
|---|---|
| 1801-4000-1 PRIMARY | Malwin Electronics Corp. (USA) |
| Reference | Meaning |
|---|---|
| 1801-4000 | D/9 Drawing number reference only Malwin Electronics Corp. |
NSN 3020-01-063-1956 is a Gear Cluster, manufactured by Malwin Electronics Corp., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-063-1956 has 1 manufacturer part number on file: 1801-4000-1 (Malwin Electronics Corp.).
1 possible match (shared part number, not a government interchangeability claim): 4130-01-158-0256. Verify interchangeability with system specifications before substitution.
Key specifications for 1801-4000-1: Hub Nominal Diameter: 0.0397 INCHES BETWEEN FIRST AND SECOND GEAR IN; Hub Nominal Diameter: 0.0397 INCHES BETWEEN SECOND AND THIRD GEAR IN; Design Type: SPUR SECOND GEAR; Design Type: SPUR FIRST GEAR. 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.