The Gear Cluster, cataloged under National Stock Number 3020-00-239-0089, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-239-0089 |
| Primary Part Number | 1175760 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.315 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.437 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.562 INCHES FIRST END IN |
| Hub Nominal Diameter | 0.562 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Backlash Designation | GRADE A FIRST GEAR |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Precision Classification | QUALITY NUMBER 10 OR QUALITY NUMBER 12 ALL GEARS |
| Nominal Overall Length | 0.453 INCHES IN |
| Material Document and Classification | QQ-B-626,ALLOY 360,1/2H FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | PLAIN BOTH ENDS |
| Hub Nominal Length | 0.031 INCHES SECOND END IN |
| Hub Nominal Length | 0.078 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Length | 0.0790 INCHES FIRST END IN |
| Nominal Outside Diameter | 0.699 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 3.649 INCHES FIRST GEAR IN |
| Material | COPPER ALLOY OVERALL |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 1175760 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 3020-00-239-0089 is a Gear Cluster, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-239-0089 has 1 manufacturer part number on file: 1175760 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 1175760: Bore Nominal Diameter: 0.315 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.437 INCHES SECOND END IN; Hub Nominal Diameter: 0.562 INCHES FIRST END IN; Hub Nominal Diameter: 0.562 INCHES BETWEEN FIRST AND SECOND GEAR IN. 20 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.