The Gear Cluster, cataloged under National Stock Number 3020-00-421-7666, 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 Raytheon Company Dba Raytheon Co. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-421-7666 |
| Primary Part Number | 370193 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Raytheon Company Dba Raytheon Co |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.310 INCHES SECOND END0.310 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.440 INCHES FIRST END0.440 INCHES FIRST END IN |
| Surface Treatment Document and Classification | MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE SECOND GEARMIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE SECOND GEAR |
| Surface Treatment Document and Classification | MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE SECOND GEARUNABLE TO DECODE |
| Surface Treatment Document and Classification | MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE THIRD GEARMIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE THIRD GEAR |
| Design Type | UNABLE TO DECODESPUR ALL GEARSSPUR ALL GEARS |
| Nominal Overall Length | 1.900 INCHES1.900 INCHES IN |
| Material Document and Classification | AMS 5643,COND A ASSN STD SINGLE MATERIAL RESPONSE SECOND GEARAMS 5643,COND A ASSN STD SINGLE MATERIAL RESPONSE SECOND GEAR |
| Material Document and Classification | AMS 5643,COND A ASSN STD SINGLE MATERIAL RESPONSE THIRD GEARAMS 5643,COND A ASSN STD SINGLE MATERIAL RESPONSE THIRD GEAR |
| Material Document and Classification | QQ-B-679 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEARQQ-B-679 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR |
| Hub Style Designator | PLAIN FIRST ENDPLAIN FIRST END |
| Hub Style Designator | 1 STEP SECOND END1 STEP SECOND END |
| Hub Nominal Length | 0.125 INCHES FIRST END0.125 INCHES FIRST END IN |
| Hub Nominal Length | 0.361 INCHES SECOND END0.361 INCHES SECOND END IN |
| Nominal Outside Diameter | 0.200 INCHES THIRD GEAR0.200 INCHES THIRD GEAR IN |
| Nominal Outside Diameter | 1.000 INCHES SECOND GEAR1.000 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 1.604 INCHES FIRST GEAR1.604 INCHES FIRST GEAR IN |
| Surface Treatment | PASSIVATE SECOND GEARPASSIVATE SECOND GEAR |
| Surface Treatment | PASSIVATE THIRD GEARPASSIVATE THIRD GEAR |
| Material | ALUMINUM ALLOY FIRST GEARALUMINUM ALLOY FIRST GEAR |
| Material | STEEL CORROSION RESISTING SECOND GEARSTEEL CORROSION RESISTING SECOND GEAR |
| Material | STEEL CORROSION RESISTING THIRD GEARSTEEL CORROSION RESISTING THIRD GEAR |
| Construction | ASSEMBLEDASSEMBLED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3020-00-421-7666 is a Gear Cluster, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-421-7666 has 2 manufacturer part numbers on file: 370193 (Raytheon Company), 370193 (Raytheon Company Dba Raytheon Co).
Key specifications for 370193: Hub Nominal Diameter: 0.310 INCHES SECOND END0.310 INCHES SECOND END IN; Hub Nominal Diameter: 0.440 INCHES FIRST END0.440 INCHES FIRST END IN; Surface Treatment Document and Classification: MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE SECOND GEARMIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE SECOND GEAR; Surface Treatment Document and Classification: MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE SECOND GEARUNABLE TO DECODE. 23 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.
NSN 3020-00-421-7666 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.