The Gear Cluster, cataloged under National Stock Number 3020-00-147-8080, 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 Caterpillar Inc Div Caterpillar Defense. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-147-8080 |
| Primary Part Number | 3B8059 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Keyway Nominal Width | 0.375 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.750 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.625 INCHES SECOND END IN |
| Hub Nominal Diameter | 6.625 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Design Type | SPUR FIRST GEAR |
| Design Type | HELICAL SECOND GEAR |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Overall Length | 3.125 INCHES IN |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | PLAIN SECOND END |
| Hub Nominal Length | 0.3750 INCHES SECOND END IN |
| Hub Nominal Length | 0.500 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 13.0000 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 7.2500 INCHES FIRST GEAR IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.063 INCHES BOTH ENDS IN |
| Material | STEEL OVERALL |
| Construction | SOLID |
| Attachment Method | MOUNTING HOLE |
| 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 |
|---|---|
| 3B8059 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 75G19015-1100 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 3020-00-147-8080 is a Gear Cluster, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-147-8080 has 1 manufacturer part number on file: 3B8059 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 3B8059: Keyway Nominal Width: 0.375 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.750 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.625 INCHES SECOND END IN; Hub Nominal Diameter: 6.625 INCHES BETWEEN FIRST AND SECOND GEAR 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.