The Gear Set,helical,matched, cataloged under National Stock Number 3020-01-424-9143, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-424-9143 |
| Item Name | Gear Set,helical,matched |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Component Quantity | 2 |
| Nonsupply Items and Quantities | GEARSHAFT HELICAL 1, GEAR HELICAL 1 |
| 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 |
|---|---|
| 6406838 | D/9 Drawing number reference only Naval Sea Systems Command |
| DF1706-438 AY98 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 211049014 | 3/2 Design control — primary reference U.S. Government activity |
| 752-6406838-AY98 | 5/9 Secondary reference Naval Sea Systems Command |
| 211049014 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 3020-01-424-9143 is a Gear Set,helical,matched, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 3020-01-424-9147, 3040-01-437-1448. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-424-9143: Component Quantity: 2; Nonsupply Items and Quantities: GEARSHAFT HELICAL 1, GEAR HELICAL 1; Special Features: GEARSHAFT OA LG 9.440 IN., GEAR HELICAL OD 5.250 IN. RIGHT HAND HELICAL IN. 2 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.