The Gear Set,worm and Worm Wheel,mat, cataloged under National Stock Number 3020-01-418-8959, 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 2 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-418-8959 |
| Primary Part Number | 512-6408984-12 |
| Item Name | Gear Set,worm and Worm Wheel,mat |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Component Quantity | 2 |
| Nonsupply Items and Quantities | GEAR 1, WORM SHAFT 1 |
| 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 |
|---|---|
| 512-6408984-12 | Naval Sea Systems Command (USA) |
| 211057816 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 211057816 | 3/2 Design control — primary reference U.S. Government activity |
| 6408984 | D/9 Drawing number reference only Naval Sea Systems Command |
| 512--6408984-12 | 5/2 Secondary reference U.S. Government activity |
| DF331084 FIND 12 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 72530 | 5/1 Secondary reference U.S. Government activity |
NSN 3020-01-418-8959 is a Gear Set,worm and Worm Wheel,mat, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-418-8959 has 2 manufacturer part numbers on file: 512-6408984-12 (Naval Sea Systems Command), 211057816 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 6230-01-529-7313. Verify interchangeability with system specifications before substitution.
Key specifications for 512-6408984-12: Component Quantity: 2; Nonsupply Items and Quantities: GEAR 1, WORM SHAFT 1; Special Features: RIGHT HAND GEARSET, WORM 1.020 PD 1.500 OD, WORM WHEEL 3.980 IN. PD 4.230 IN. OD, RATIO 30 TO 1, USED IN VENTILATION ELECRICAL ENCLOSURE (CENTER) BACK-UP DAMPER, WEAPONS SYSTEM SEAWOLF CLASS SSN 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.