The Gear Cluster, cataloged under National Stock Number 3020-00-797-9530, 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 Us Army Aviation and Missile Command. Government technical data includes 28 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 | 3020-00-797-9530 |
| Primary Part Number | 8171719 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Bore Nominal Diameter | UNABLE TO DECODE0.749 INCHES BOTH ENDS0.749 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | UNABLE TO DECODE1.375 INCHES FIRST END1.375 INCHES FIRST END IN |
| Hub Nominal Diameter | UNABLE TO DECODE2.750 INCHES BETWEEN FIRST AND SECOND GEAR2.750 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Design Type | UNABLE TO DECODESPUR SECOND GEARSPUR SECOND GEAR |
| Design Type | UNABLE TO DECODESPUR FIRST GEARSPUR FIRST GEAR |
| Bore Style | UNABLE TO DECODEPLAIN BOTH ENDSPLAIN BOTH ENDS |
| Hardness Rating | UNABLE TO DECODE25.0 ROCKWELL C NOMINAL HUB25.0 ROCKWELL C NOMINAL HUB |
| Nominal Overall Length | 1.156 INCHES1.156 INCHES IN |
| Material Document and Classification | QQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEARQQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEAR |
| Material Document and Classification | QQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEARUNABLE TO DECODE |
| Material Document and Classification | UNABLE TO DECODEQQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEARQQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR |
| Hub Style Designator | UNABLE TO DECODEPLAIN BETWEEN FIRST AND SECOND GEARPLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | UNABLE TO DECODEPINNED FIRST ENDPINNED FIRST END |
| Hub Nominal Length | UNABLE TO DECODE0.218 INCHES BETWEEN FIRST AND SECOND GEAR0.218 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Length | UNABLE TO DECODE0.500 INCHES FIRST END0.500 INCHES FIRST END IN |
| Nominal Outside Diameter | UNABLE TO DECODE3.373 INCHES SECOND GEAR3.373 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | UNABLE TO DECODE9.373 INCHES FIRST GEAR9.373 INCHES FIRST GEAR IN |
| Surface Treatment | PASSIVATE SHAFT/HUBPASSIVATE SHAFT/HUB |
| Surface Treatment | UNABLE TO DECODE |
| Surface Treatment | ANODIZE FIRST GEARANODIZE FIRST GEAR |
| Surface Treatment | ANODIZE FIRST GEARUNABLE TO DECODE |
| Surface Treatment | ANODIZE SECOND GEARANODIZE SECOND GEAR |
| Surface Treatment | ANODIZE SECOND GEARUNABLE TO DECODE |
| Material | UNABLE TO DECODEALUMINUM ALLOY 2024 FIRST GEARALUMINUM ALLOY 2024 FIRST GEAR |
| Material | UNABLE TO DECODEALUMINUM ALLOY 2024 SECOND GEARALUMINUM ALLOY 2024 SECOND GEAR |
| Material | UNABLE TO DECODESTEEL CORROSION RESISTING SHAFT/HUBSTEEL CORROSION RESISTING SHAFT/HUB |
| Construction | ASSEMBLEDASSEMBLED |
| Attachment Method | MOUNTING HOLEMOUNTING HOLE |
| 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 |
|---|---|
| 8171719 PRIMARY | Us Army Aviation and Missile Command (USA) |
NSN 3020-00-797-9530 is a Gear Cluster, manufactured by Us Army Aviation and Missile Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-797-9530 has 1 manufacturer part number on file: 8171719 (Us Army Aviation and Missile Command).
Key specifications for 8171719: Bore Nominal Diameter: UNABLE TO DECODE0.749 INCHES BOTH ENDS0.749 INCHES BOTH ENDS IN; Hub Nominal Diameter: UNABLE TO DECODE1.375 INCHES FIRST END1.375 INCHES FIRST END IN; Hub Nominal Diameter: UNABLE TO DECODE2.750 INCHES BETWEEN FIRST AND SECOND GEAR2.750 INCHES BETWEEN FIRST AND SECOND GEAR IN; Design Type: UNABLE TO DECODESPUR SECOND GEARSPUR SECOND GEAR. 28 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.