The Gear Cluster, cataloged under National Stock Number 3020-01-055-5984, 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 11 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. 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 | 3020-01-055-5984 |
| Primary Part Number | 154228 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Hub Nominal Diameter | 3.2500 INCHES BETWEEN SECOND AND THIRD GEAR IN |
| Counterbore Nominal Diameter | 2.8430 INCHES SECOND END IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 33 SECOND END |
| Hub Nominal Length | 0.219 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Length | 1.2187 INCHES SECOND END IN |
| Hub Nominal Length | 2.5460 INCHES FIRST END IN |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 154228 PRIMARY | Northrop Grumman Systems Corporation (USA) |
NSN 3020-01-055-5984 is a Gear Cluster, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-055-5984 has 1 manufacturer part number on file: 154228 (Northrop Grumman Systems Corporation).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-549-0916. Verify interchangeability with system specifications before substitution.
Key specifications for 154228: Hub Nominal Diameter: 3.2500 INCHES BETWEEN SECOND AND THIRD GEAR IN; Counterbore Nominal Diameter: 2.8430 INCHES SECOND END IN; Design Type: SPUR SECOND GEAR; Design Type: SPUR FIRST GEAR. 11 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.