The Gear Cluster, cataloged under National Stock Number 3020-01-434-5478, 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 Naval Sea Systems Command. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-434-5478 |
| Primary Part Number | 211055553 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.314 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.880 INCHES FIRST END IN |
| Design Type | SPUR ALL GEARS |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Overall Length | 2.125 INCHES IN |
| Features Provided | LIGHTENING HOLE |
| Hub Style Designator | PLAIN FIRST END |
| Hub Nominal Length | 1.000 INCHES FIRST END IN |
| Nominal Outside Diameter | 2.164 INCHES FIRST GEAR IN |
| Nominal Outside Diameter | 7.164 INCHES SECOND GEAR IN |
| Material | COPPER ALLOY ALL GEARS |
| 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 |
|---|---|
| 167-6404604-50 | Naval Sea Systems Command (USA) |
| 167-6404604 FIND 50 | Naval Sea Systems Command (USA) |
| 211055553 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6404604 | D/9 Drawing number reference only Naval Sea Systems Command |
| DF1502-255 FN 55 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 3020-01-434-5478 is a Gear Cluster, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-434-5478 has 3 manufacturer part numbers on file: 167-6404604-50 (Naval Sea Systems Command), 167-6404604 FIND 50 (Naval Sea Systems Command), 211055553 (Naval Sea Systems Command).
Key specifications for 211055553: Bore Nominal Diameter: 1.314 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.880 INCHES FIRST END IN; Design Type: SPUR ALL GEARS; Bore Style: PLAIN BOTH ENDS. 12 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.