The Gear Cluster, cataloged under National Stock Number 3020-00-125-9604, 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 Martin-Baker Aircraft Company Limited. Government technical data includes 16 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-125-9604 |
| Primary Part Number | MBEU35128 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Martin-Baker Aircraft Company Limited |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.498 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.500 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Diameter | 0.298 INCHES FIRST END IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Nominal Overall Length | 1.938 INCHES IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | 1 STEP SECOND END |
| Hub Nominal Length | 0.500 INCHES SECOND END IN |
| Hub Nominal Length | 0.2656 INCHES FIRST END IN |
| Hub Nominal Length | 0.281 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 0.875 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 1.7222 INCHES FIRST GEAR IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
NSN 3020-00-125-9604 is a Gear Cluster, manufactured by Martin-Baker Aircraft Company Limited, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-125-9604 has 2 manufacturer part numbers on file: MBEU35128 (Martin-Baker America, Inc), MBEU35128 (Martin-Baker Aircraft Company Limited).
Key specifications for MBEU35128: Hub Nominal Diameter: 0.498 INCHES SECOND END IN; Hub Nominal Diameter: 0.500 INCHES BETWEEN FIRST AND SECOND GEAR IN; Hub Nominal Diameter: 0.298 INCHES FIRST END IN; Design Type: SPUR SECOND GEAR. 16 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.