The Gear Cluster, cataloged under National Stock Number 3020-00-403-9775, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-403-9775 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.062 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.162 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Backlash Designation | GRADE C ALL GEARS |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Precision Classification | QUALITY NUMBER 10 OR QUALITY NUMBER 11 ALL GEARS |
| Nominal Overall Length | 0.476 INCHES IN |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE AND AISI 416/SAE 51416 ASSN STD SINGLE MATERIAL RESPONSE SECOND GEAR |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE AND AISI 416/SAE 51416 ASSN STD SINGLE MATERIAL RESPONSE SHAFT/HUB |
| Material Document and Classification | MIL-S-5059,1/2 HARD MIL SPEC SINGLE MATERIAL RESPONSE FIRST GEAR |
| Hub Style Designator | 1 STEP BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | 1 STEP BOTH ENDS |
| Hub Nominal Length | 0.144 INCHES FIRST END IN |
| Hub Nominal Length | 0.060 INCHES SECOND END IN |
| Hub Nominal Length | 0.168 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 0.208 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 0.3500 INCHES FIRST GEAR IN |
| Material | STEEL COMP 416 SHAFT/HUB |
| 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 |
|---|---|
| MG5-203 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-403-9775 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-403-9775: Hub Nominal Diameter: 0.062 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.162 INCHES BETWEEN FIRST AND SECOND GEAR IN; Backlash Designation: GRADE C ALL GEARS; Design Type: SPUR SECOND GEAR. 21 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.