The Gear Cluster, cataloged under National Stock Number 3020-00-403-9777, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-403-9777 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.130 INCHES FIRST END IN |
| Hub Nominal Diameter | 0.093 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.130 INCHES FIRST END IN |
| Hub Nominal Diameter | 0.200 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Design Type | SPUR ALL GEARS |
| Bore Style | PLAIN FIRST END |
| Precision Classification | QUALITY NUMBER 12 ALL GEARS |
| Nominal Overall Length | 0.476 INCHES IN |
| Material Document and Classification | MIL-S-5059A MIL SPEC SINGLE MATERIAL RESPONSE FIRST GEAR A |
| Hub Style Designator | 2 STEPS FIRST END |
| Hub Style Designator | 1 STEP BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | 1 STEP SECOND END |
| Hub Nominal Length | 0.114 INCHES FIRST END IN |
| Hub Nominal Length | 0.099 INCHES SECOND END IN |
| Hub Nominal Length | 0.029 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 0.191 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 0.492 INCHES FIRST GEAR IN |
| Material | STEEL COMP 302 FIRST GEAR |
| Material | STEEL COMP 416 SECOND GEAR |
| 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 |
| Reference | Meaning |
|---|---|
| MG5-227 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-403-9777 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-403-9777: Bore Nominal Diameter: 0.130 INCHES FIRST END IN; Hub Nominal Diameter: 0.093 INCHES SECOND END IN; Hub Nominal Diameter: 0.130 INCHES FIRST END IN; Hub Nominal Diameter: 0.200 INCHES BETWEEN FIRST AND SECOND GEAR IN. 20 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.