The Gear Cluster, cataloged under National Stock Number 3020-00-866-9937, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-866-9937 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.125 INCHES BOTH ENDS IN |
| Backlash Designation | GRADE C ALL GEARS |
| Surface Treatment Document and Classification | MIL-F-14072,E300/LPS 452 MIL SPEC SINGLE TREATMENT RESPONSE SECOND GEAR |
| Counterbore Nominal Diameter | 0.156 INCHES BOTH ENDS IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Precision Classification | QUALITY NUMBER 9 ALL GEARS |
| Nominal Overall Length | 0.253 INCHES IN |
| Material Document and Classification | QQ-A-225/6,T6 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR |
| Material Document and Classification | QQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE SECOND GEAR |
| Nominal Outside Diameter | 0.226 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 0.615 INCHES FIRST GEAR IN |
| Surface Treatment | PASSIVATE SECOND GEAR |
| Material | STEEL COMP 416 SECOND GEAR |
| Material | ALUMINUM ALLOY 2024 FIRST GEAR |
| Counterbore Nominal Depth | 0.096 INCHES BOTH ENDS IN |
| Construction | ASSEMBLED |
| 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 |
|---|---|
| 188815-000 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-866-9937 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-866-9937: Bore Nominal Diameter: 0.125 INCHES BOTH ENDS IN; Backlash Designation: GRADE C ALL GEARS; Surface Treatment Document and Classification: MIL-F-14072,E300/LPS 452 MIL SPEC SINGLE TREATMENT RESPONSE SECOND GEAR; Counterbore Nominal Diameter: 0.156 INCHES BOTH ENDS IN. 18 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.