The Gear Cluster, cataloged under National Stock Number 3020-00-340-3418, 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18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-340-3418 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.501 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 3.250 INCHES SECOND END IN |
| Hub Nominal Diameter | 2.531 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 3.251 INCHES IN |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 19 BOTH ENDS |
| Hub Nominal Length | 0.3130 INCHES SECOND END IN |
| Hub Nominal Length | 0.438 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 4.164 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 4.997 INCHES FIRST GEAR IN |
| Material | STEEL OVERALL |
| Spline Pitch Diameter | 2.3750 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 |
| Reference | Meaning |
|---|---|
| A3026B | 3/9 Design control — primary reference U.S. Government activity |
NSN 3020-00-340-3418 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-340-3418: Bore Nominal Diameter: 2.501 INCHES BOTH ENDS IN; Hub Nominal Diameter: 3.250 INCHES SECOND END IN; Hub Nominal Diameter: 2.531 INCHES BETWEEN FIRST AND SECOND GEAR IN; Design Type: SPUR SECOND GEAR. 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.