The Gear Cluster, cataloged under National Stock Number 3020-01-196-1420, 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 Northrop Grumman Systems Corporation. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-196-1420 |
| Primary Part Number | 1851964-1 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Design Type | SPUR ALL GEARS |
| Surface Treatment | PASSIVATE OVERALL |
| Material | ALUMINUM AND 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 |
|---|---|
| 1851964-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 1878090 PIECE 16 | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1878090 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
NSN 3020-01-196-1420 is a Gear Cluster, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-196-1420 has 2 manufacturer part numbers on file: 1851964-1 (Northrop Grumman Systems Corporation), 1878090 PIECE 16 (Northrop Grumman Systems Corporation).
1 possible match (shared part number, not a government interchangeability claim): 2540-01-441-1819. Verify interchangeability with system specifications before substitution.
Key specifications for 1851964-1: Surface Treatment Document and Classification: MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Design Type: SPUR ALL GEARS; Surface Treatment: PASSIVATE OVERALL; Material: ALUMINUM AND STEEL OVERALL. 4 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.