The Gear Cluster, cataloged under National Stock Number 3020-00-509-9799, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 26 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-509-9799 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.250 INCHES FIRST ENDUNABLE TO DECODE IN |
| Hub Nominal Diameter | 0.300 INCHES BETWEEN FIRST AND SECOND GEARUNABLE TO DECODE IN |
| Hub Nominal Diameter | 0.300 INCHES BETWEEN SECOND AND THIRD GEARUNABLE TO DECODE IN |
| Hub Nominal Diameter | 0.300 INCHES SECOND ENDUNABLE TO DECODE IN |
| Surface Treatment Document and Classification | UNABLE TO DECODE |
| Surface Treatment Document and Classification | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Design Type | SPUR SECOND GEARUNABLE TO DECODE |
| Design Type | SPUR FIRST GEARUNABLE TO DECODE |
| Design Type | SPUR THIRD GEARUNABLE TO DECODE |
| Nominal Overall Length | 2.240 INCHES IN |
| Material Document and Classification | UNABLE TO DECODE |
| Material Document and Classification | AMS 5643H,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| 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 | 0.135 INCHES FIRST ENDUNABLE TO DECODE IN |
| Hub Nominal Length | 0.260 INCHES BETWEEN FIRST AND SECOND GEARUNABLE TO DECODE IN |
| Hub Nominal Length | 0.445 INCHES SECOND ENDUNABLE TO DECODE IN |
| Hub Nominal Length | 0.565 INCHES BETWEEN SECOND AND THIRD GEARUNABLE TO DECODE IN |
| Nominal Outside Diameter | 0.499 INCHES SECOND GEARUNABLE TO DECODE IN |
| Nominal Outside Diameter | 0.499 INCHES THIRD GEARUNABLE TO DECODE IN |
| Nominal Outside Diameter | 1.265 INCHES FIRST GEARUNABLE TO DECODE IN |
| Surface Treatment | UNABLE TO DECODE |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 630 OVERALLUNABLE TO DECODE |
| Construction | SOLID |
| 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 |
|---|---|
| 708071 | D/9 Drawing number reference only U.S. Government activity |
| 708071-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-509-9799 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3020-01-134-8975. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-509-9799: Hub Nominal Diameter: 0.250 INCHES FIRST ENDUNABLE TO DECODE IN; Hub Nominal Diameter: 0.300 INCHES BETWEEN FIRST AND SECOND GEARUNABLE TO DECODE IN; Hub Nominal Diameter: 0.300 INCHES BETWEEN SECOND AND THIRD GEARUNABLE TO DECODE IN; Hub Nominal Diameter: 0.300 INCHES SECOND ENDUNABLE TO DECODE IN. 26 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.