The Gear Cluster, cataloged under National Stock Number 3020-01-122-8281, 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 Dynalec Corporation. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-01-122-8281 |
| Primary Part Number | K1439 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Dynalec Corporation |
| Status | ACTIVE |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Nominal Outside Diameter | 0.7083 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 0.7917 INCHES FIRST GEAR IN |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| K1439 PRIMARY | Dynalec Corporation (USA) |
| PR3404-1PIECE121 PRIMARY | Dynalec Corporation (USA) |
| Reference | Meaning |
|---|---|
| K1439 | 5/9 Secondary reference The Electric Tachometer Corp. |
| PR3404-1PIECE121 | 5/9 Secondary reference The Electric Tachometer Corp. |
NSN 3020-01-122-8281 is a Gear Cluster, manufactured by Dynalec Corporation, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-122-8281 has 2 manufacturer part numbers on file: K1439 (Dynalec Corporation), PR3404-1PIECE121 (Dynalec Corporation).
Key specifications for K1439: Design Type: SPUR SECOND GEAR; Design Type: SPUR FIRST GEAR; Nominal Outside Diameter: 0.7083 INCHES SECOND GEAR IN; Nominal Outside Diameter: 0.7917 INCHES FIRST GEAR IN. 5 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.