The Gear Cluster, cataloged under National Stock Number 3020-00-346-7696, 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 Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. Government technical data includes 19 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 | 3020-00-346-7696 |
| Primary Part Number | 7666399 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.626 INCHES SECOND END IN |
| Bore Nominal Diameter | 1.213 INCHES FIRST COUNTERBORE FIRST END IN |
| Surface Treatment Document and Classification | MIL-P-12011 FN 22.04 GR 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Counterbore Nominal Diameter | 1.313 INCHES SECOND END IN |
| Design Type | SPUR ALL GEARS |
| Bore Style | PLAIN SECOND END |
| Bore Style | W/COUNTERBORE FIRST COUNTERBORE FIRST END |
| Hardness Rating | 56.0 ROCKWELL C MINIMUM OR 60.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 1.473 INCHES IN |
| Material Document and Classification | QQ-S-624 AL 4150 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Hub Nominal Length | 0.135 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Length | 0.370 INCHES BETWEEN SECOND AND THIRD GEAR IN |
| Nominal Outside Diameter | 1.125 INCHES FOURTH GEAR IN |
| Nominal Outside Diameter | 1.495 INCHES THIRD GEAR IN |
| Nominal Outside Diameter | 1.843 INCHES SECOND GEAR IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 303SE OVERALL |
| Counterbore Nominal Depth | 0.291 INCHES SECOND END IN |
| 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 |
|---|---|
| 7666399 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
NSN 3020-00-346-7696 is a Gear Cluster, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-346-7696 has 1 manufacturer part number on file: 7666399 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 7666399: Bore Nominal Diameter: 0.626 INCHES SECOND END IN; Bore Nominal Diameter: 1.213 INCHES FIRST COUNTERBORE FIRST END IN; Surface Treatment Document and Classification: MIL-P-12011 FN 22.04 GR 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Counterbore Nominal Diameter: 1.313 INCHES SECOND END IN. 19 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.