The Gear Cluster, cataloged under National Stock Number 3020-00-705-1658, 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26 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-705-1658 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | UNABLE TO DECODE0.219 INCHES BOTH ENDS0.219 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | UNABLE TO DECODE0.500 INCHES FIRST END0.500 INCHES FIRST END IN |
| Hub Nominal Diameter | UNABLE TO DECODE0.927 INCHES BETWEEN FIRST AND SECOND GEAR0.927 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 |
| Nominal Overall Length | 0.750 INCHES0.750 INCHES IN |
| Material Document and Classification | QQ-S-763,CLASS 304L FED SPEC SINGLE MATERIAL RESPONSE SHAFT/HUBQQ-S-763,CLASS 304L FED SPEC SINGLE MATERIAL RESPONSE SHAFT/HUB |
| Material Document and Classification | QQ-S-763,CLASS 304L FED SPEC SINGLE MATERIAL RESPONSE SHAFT/HUBUNABLE TO DECODE |
| Material Document and Classification | UNABLE TO DECODEQQ-B-639,ALLOY 464 HARD FED SPEC SINGLE MATERIAL RESPONSE FIRST GEARQQ-B-639,ALLOY 464 HARD FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR |
| Material Document and Classification | UNABLE TO DECODEQQ-S-763,CLASS 304L FED SPEC SINGLE MATERIAL RESPONSE SECOND GEARQQ-S-763,CLASS 304L FED SPEC SINGLE MATERIAL RESPONSE SECOND 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 DECODE0.062 INCHES BETWEEN FIRST AND SECOND GEAR0.062 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Length | UNABLE TO DECODE0.3710 INCHES FIRST END0.3710 INCHES FIRST END IN |
| Nominal Outside Diameter | UNABLE TO DECODE1.042 INCHES SECOND GEAR1.042 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | UNABLE TO DECODE4.0417 INCHES FIRST GEAR4.0417 INCHES FIRST GEAR IN |
| Surface Treatment | PASSIVATE SHAFT/HUBPASSIVATE SHAFT/HUB |
| Surface Treatment | UNABLE TO DECODE |
| Surface Treatment | PASSIVATE SECOND GEARUNABLE TO DECODE |
| Surface Treatment | PASSIVATE SECOND GEARPASSIVATE SECOND GEAR |
| Material | UNABLE TO DECODECOPPER ALLOY FIRST GEARCOPPER ALLOY FIRST GEAR |
| Material | UNABLE TO DECODESTEEL COMP 304L SECOND GEARSTEEL COMP 304L SECOND GEAR |
| Material | UNABLE TO DECODESTEEL COMP 304L SHAFT/HUBSTEEL COMP 304L 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 |
| Reference | Meaning |
|---|---|
| C311-280 | 3/2 Design control — primary reference U.S. Government activity |
| 3307639 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-00-705-1658 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-705-1658: Bore Nominal Diameter: UNABLE TO DECODE0.219 INCHES BOTH ENDS0.219 INCHES BOTH ENDS IN; Hub Nominal Diameter: UNABLE TO DECODE0.500 INCHES FIRST END0.500 INCHES FIRST END IN; Hub Nominal Diameter: UNABLE TO DECODE0.927 INCHES BETWEEN FIRST AND SECOND GEAR0.927 INCHES BETWEEN FIRST AND SECOND GEAR IN; Design Type: UNABLE TO DECODESPUR SECOND GEARSPUR SECOND GEAR. 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.