The Gear Cluster, cataloged under National Stock Number 3020-00-453-7966, 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 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 | 3020-00-453-7966 |
| Primary Part Number | 5B4812 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.878 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.250 INCHES SECOND END IN |
| Hub Nominal Diameter | 2.375 INCHES FIRST END IN |
| Hub Nominal Diameter | 2.375 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Overall Length | 3.250 INCHES IN |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 16 BOTH ENDS |
| Hub Nominal Length | 0.063 INCHES FIRST END IN |
| Hub Nominal Length | 1.250 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Length | 2.2500 INCHES SECOND END IN |
| Nominal Outside Diameter | 3.284 INCHES FIRST GEAR IN |
| Nominal Outside Diameter | 3.998 INCHES SECOND GEAR IN |
| Material | STEEL OVERALL |
| Spline Pitch Diameter | 1.7500 INCHES NOMINAL BOTH ENDS 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 |
|---|---|
| 5B4812 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 3020-00-453-7966 is a Gear Cluster, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-453-7966 has 1 manufacturer part number on file: 5B4812 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 5B4812: Bore Nominal Diameter: 1.878 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.250 INCHES SECOND END IN; Hub Nominal Diameter: 2.375 INCHES FIRST END IN; Hub Nominal Diameter: 2.375 INCHES BETWEEN FIRST AND SECOND GEAR 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.