The Gear Cluster, cataloged under National Stock Number 3020-01-045-3288, 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21 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-045-3288 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.312 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Diameter | 0.250 INCHES BOTH ENDS IN |
| Surface Treatment Document and Classification | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Precision Classification | QUALITY NUMBER 10 OR QUALITY NUMBER 11 ALL GEARS |
| Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 1.422 INCHES IN |
| Material Document and Classification | QQ-S-764,TYPE 416,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | PLAIN FIRST END |
| Hub Style Designator | 1 STEP SECOND END |
| Hub Nominal Length | 0.563 INCHES SECOND END IN |
| Hub Nominal Length | 0.250 INCHES FIRST END IN |
| Hub Nominal Length | 0.062 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 0.5665 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 1.1562 INCHES FIRST GEAR IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 416 OVERALL |
| Construction | SOLID |
| Attachment Method | MOUNTING HOLE |
| 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 |
|---|---|
| SM-C-686556 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-045-3288 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-045-3288: Hub Nominal Diameter: 0.312 INCHES BETWEEN FIRST AND SECOND GEAR IN; Hub Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Surface Treatment Document and Classification: MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; 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.