The Gear Cluster, cataloged under National Stock Number 3020-01-025-5977, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-025-5977 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.380 INCHES FIRST END IN |
| Backlash Designation | GRADE C FIRST GEAR |
| Surface Treatment Document and Classification | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE SECOND GEAR |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Precision Classification | QUALITY NUMBER 12 ALL GEARS |
| Nominal Overall Length | 0.500 INCHES IN |
| Material Document and Classification | QQ-B-750,COMP A FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEAR |
| Hub Style Designator | PINNED FIRST END |
| Hub Nominal Length | 0.188 INCHES FIRST END IN |
| Nominal Outside Diameter | 0.562 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 1.061 INCHES FIRST GEAR IN |
| Surface Treatment | PASSIVATE SECOND GEAR |
| Material | STEEL COMP 303 SECOND GEAR |
| Material | COPPER ALLOY 510 FIRST 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 |
|---|---|
| 35000023-1 | 3/9 Design control — primary reference U.S. Government activity |
NSN 3020-01-025-5977 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-025-5977: Hub Nominal Diameter: 0.380 INCHES FIRST END IN; Backlash Designation: GRADE C FIRST GEAR; Surface Treatment Document and Classification: MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE SECOND GEAR; Design Type: SPUR SECOND GEAR. 18 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.