The Gear Cluster, cataloged under National Stock Number 3020-00-573-7072, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-573-7072 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.187 INCHES FIRST END IN |
| Hub Nominal Diameter | 0.186 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.150 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Nominal Overall Length | 0.875 INCHES IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | PLAIN SECOND END |
| Hub Nominal Length | 0.1875 INCHES SECOND END IN |
| Hub Nominal Length | 0.250 INCHES FIRST END IN |
| Hub Nominal Length | 0.031 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 0.265 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 2.0208 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 |
| Reference | Meaning |
|---|---|
| 4550858 | 5/9 Secondary reference The Boeing Company |
| 4550858 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-573-7072 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-573-7072: Hub Nominal Diameter: 0.187 INCHES FIRST END IN; Hub Nominal Diameter: 0.186 INCHES SECOND END IN; Hub Nominal Diameter: 0.150 INCHES BETWEEN FIRST AND SECOND GEAR IN; Design Type: SPUR SECOND GEAR. 16 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.