The Gear Cluster, cataloged under National Stock Number 3020-00-545-3490, 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 Dba Northrop Grumman Systems Corp. Government technical data includes 18 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 | 3020-00-545-3490 |
| Primary Part Number | 625606 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.125 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.176 INCHES FIRST END IN |
| Hub Nominal Diameter | 0.190 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Overall Length | 0.400 INCHES IN |
| Material Document and Classification | MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | SPLIT FIRST END |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Nominal Length | 0.047 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Length | 0.1900 INCHES FIRST END IN |
| Nominal Outside Diameter | 0.4420 INCHES FIRST GEAR IN |
| Nominal Outside Diameter | 1.0830 INCHES SECOND GEAR IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 303S OR STEEL COMP 303SE OVERALL |
| Construction | SOLID |
| Attachment Method | CLAMP |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3020-00-545-3490 is a Gear Cluster, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-545-3490 has 2 manufacturer part numbers on file: 625609 (Guptill Gear Corp), 625606 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).
Key specifications for 625606: Bore Nominal Diameter: 0.125 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.176 INCHES FIRST END IN; Hub Nominal Diameter: 0.190 INCHES BETWEEN FIRST AND SECOND GEAR IN; Design Type: SPUR SECOND GEAR. 18 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.