The Gear Cluster, cataloged under National Stock Number 3020-01-416-1653, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-416-1653 |
| Primary Part Number | 6397426-0A-104 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.5317 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 3.060 INCHES BOTH ENDS IN |
| Design Type | SPUR ALL GEARS |
| Bore Style | PLAIN BOTH ENDS |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 2.591 INCHES IN |
| Material Document and Classification | MIL-S-5000 MIL STD SINGLE MATERIAL RESPONSE ALL GEARS |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 3.567 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 4.167 INCHES FIRST GEAR IN |
| Material | STEEL 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 |
|---|---|
| 6397426-0A-104 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 603-6397426 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-416-1653 is a Gear Cluster, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-416-1653 has 1 manufacturer part number on file: 6397426-0A-104 (Naval Sea Systems Command).
Key specifications for 6397426-0A-104: Bore Nominal Diameter: 2.5317 INCHES BOTH ENDS IN; Hub Nominal Diameter: 3.060 INCHES BOTH ENDS 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.