The Gear Cluster, cataloged under National Stock Number 3020-00-073-6650, 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 16 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-073-6650 |
| Primary Part Number | 1879179 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.188 INCHES BOTH ENDS IN |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE FIRST GEAR |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Precision Classification | QUALITY NUMBER 12 ALL GEARS |
| Nominal Overall Length | 0.406 INCHES IN |
| Material Document and Classification | QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR |
| Material Document and Classification | QQ-S-763,CLASS 303,COND A FED SPEC SINGLE MATERIAL RESPONSE SECOND GEAR |
| Nominal Outside Diameter | 0.3734 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 1.7489 INCHES FIRST GEAR IN |
| Surface Treatment | PASSIVATE SECOND GEAR |
| Surface Treatment | ANODIZE FIRST GEAR |
| Material | STEEL COMP 303 SECOND GEAR |
| Material | ALUMINUM ALLOY 2024 FIRST GEAR |
| Construction | ASSEMBLED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3020-00-073-6650 is a Gear Cluster, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-073-6650 has 2 manufacturer part numbers on file: 1879179 (Northrop Grumman Systems Corporation), 1879179 (Lockheed Martin Corporation Div Rms - Mitchel Field).
Key specifications for 1879179: Bore Nominal Diameter: 0.188 INCHES BOTH ENDS IN; Surface Treatment Document and Classification: MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE FIRST GEAR; Design Type: SPUR SECOND GEAR; Design Type: SPUR FIRST GEAR. 16 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.