The Gear Cluster, cataloged under National Stock Number 3020-01-321-8404, 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 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-321-8404 |
| Primary Part Number | 5186683 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.500 INCHES FIRST END IN |
| Design Type | SPUR ALL GEARS |
| Bore Style | PARTIAL FIRST END |
| Nominal Overall Length | 8.890 INCHES IN |
| Bore Nominal Depth | 6.850 INCHES FIRST END IN |
| Material Document and Classification | MIL-S-6709 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter | 3.544 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 7.714 INCHES FIRST GEAR IN |
| Material | STEEL COMP D4 OVERALL |
| Construction | SOLID |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5186683 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 3020PL0979944 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5186683 | 5/9 Secondary reference Gear Supply and Broaching Inc |
NSN 3020-01-321-8404 is a Gear Cluster, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-321-8404 has 1 manufacturer part number on file: 5186683 (Naval Sea Systems Command).
Key specifications for 5186683: Bore Nominal Diameter: 1.500 INCHES FIRST END IN; Design Type: SPUR ALL GEARS; Bore Style: PARTIAL FIRST END; Nominal Overall Length: 8.890 INCHES IN. 10 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.
NSN 3020-01-321-8404 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.