The Gear Cluster, cataloged under National Stock Number 3020-00-511-9956, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 29 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-511-9956 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.125 INCHES BETWEEN FIRST AND SECOND GEARUNABLE TO DECODE IN |
| Hub Nominal Diameter | 0.125 INCHES BOTH ENDSUNABLE TO DECODE IN |
| Hub Nominal Diameter | 0.375 INCHES BETWEEN SECOND AND THIRD GEARUNABLE TO DECODE IN |
| Surface Treatment Document and Classification | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE SHAFT/HUB |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE ALL GEARS |
| Surface Treatment Document and Classification | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE SHAFT/HUBUNABLE TO DECODE |
| Design Type | SPUR SECOND GEARUNABLE TO DECODE |
| Design Type | SPUR FIRST GEARUNABLE TO DECODE |
| Design Type | SPUR THIRD GEARUNABLE TO DECODE |
| Nominal Overall Length | 1.347 INCHES IN |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE SHAFT/HUB |
| Material Document and Classification | UNABLE TO DECODE |
| Material Document and Classification | QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE ALL GEARS |
| Hub Style Designator | PLAIN BETWEEN SECOND AND THIRD GEARUNABLE TO DECODE |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEARUNABLE TO DECODE |
| Hub Style Designator | 1 STEP BOTH ENDSUNABLE TO DECODE |
| Hub Nominal Length | 0.112 INCHES FIRST ENDUNABLE TO DECODE IN |
| Hub Nominal Length | 0.135 INCHES SECOND ENDUNABLE TO DECODE IN |
| Hub Nominal Length | 0.221 INCHES BETWEEN SECOND AND THIRD GEARUNABLE TO DECODE IN |
| Hub Nominal Length | 0.275 INCHES BETWEEN FIRST AND SECOND GEARUNABLE TO DECODE IN |
| Nominal Outside Diameter | 0.5250 INCHES THIRD GEARUNABLE TO DECODE IN |
| Nominal Outside Diameter | 1.0250 INCHES SECOND GEARUNABLE TO DECODE IN |
| Nominal Outside Diameter | 1.5250 INCHES FIRST GEARUNABLE TO DECODE IN |
| Surface Treatment | PASSIVATE SHAFT/HUB |
| Surface Treatment | UNABLE TO DECODE |
| Surface Treatment | ANODIZE ALL GEARS |
| Material | ALUMINUM ALLOY 2024 ALL GEARSUNABLE TO DECODE |
| Material | STEEL COMP 303 SHAFT/HUBUNABLE TO DECODE |
| 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 |
|---|---|
| 708087-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-511-9956 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-511-9956: Hub Nominal Diameter: 0.125 INCHES BETWEEN FIRST AND SECOND GEARUNABLE TO DECODE IN; Hub Nominal Diameter: 0.125 INCHES BOTH ENDSUNABLE TO DECODE IN; Hub Nominal Diameter: 0.375 INCHES BETWEEN SECOND AND THIRD GEARUNABLE TO DECODE IN; Surface Treatment Document and Classification: MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE SHAFT/HUB. 29 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.