The Gear Cluster, cataloged under National Stock Number 3020-00-403-9778, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-403-9778 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.100 INCHES FIRST END IN |
| Backlash Designation | GRADE C ALL GEARS |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Precision Classification | QUALITY NUMBER 12 ALL GEARS |
| Nominal Overall Length | 0.210 INCHES IN |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE AND AISI 416/SAE 51416 ASSN STD SINGLE MATERIAL RESPONSE SECOND GEAR |
| Material Document and Classification | MIL-S-5059,COMP 302,1/2 HARD MIL SPEC SINGLE MATERIAL RESPONSE FIRST GEAR |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Nominal Length | 0.098 INCHES FIRST END IN |
| Nominal Outside Diameter | 0.208 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 0.3500 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 |
|---|---|
| MG5-207 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-403-9778 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-403-9778: Hub Nominal Diameter: 0.100 INCHES FIRST END IN; Backlash Designation: GRADE C ALL GEARS; 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.