The Gear Cluster, cataloged under National Stock Number 3020-00-320-0997, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 15 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 | 3020-00-320-0997 |
| Primary Part Number | 1021039 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.3125 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Diameter | 0.3125 INCHES BETWEEN SECOND AND THIRD GEAR IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Overall Length | 0.531 INCHES IN |
| Hub Style Designator | PLAIN FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Hub Nominal Length | 0.063 INCHES SECOND END IN |
| Hub Nominal Length | 0.156 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Length | 0.125 INCHES FIRST END IN |
| Nominal Outside Diameter | 0.4460 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 2.1040 INCHES FIRST GEAR IN |
| Material | STEEL OVERALL |
| Construction | SOLID |
| 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 |
|---|---|
| 1021039 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 3020-00-320-0997 is a Gear Cluster, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-320-0997 has 1 manufacturer part number on file: 1021039 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 4510-01-210-5697. Verify interchangeability with system specifications before substitution.
Key specifications for 1021039: Hub Nominal Diameter: 0.3125 INCHES BETWEEN FIRST AND SECOND GEAR IN; Hub Nominal Diameter: 0.3125 INCHES BETWEEN SECOND AND THIRD GEAR IN; Design Type: SPUR SECOND GEAR; Design Type: SPUR FIRST GEAR. 15 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.