The Gear Cluster, cataloged under National Stock Number 3020-00-956-9945, 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 Ge Aviation Systems Llc Dba Ge Aviation Div Customer Services Whippany. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-956-9945 |
| Primary Part Number | E4594M2 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Ge Aviation Systems Llc Dba Ge Aviation Div Customer Services Whippany |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.125 INCHES SECOND END IN |
| Surface Treatment Document and Classification | MIL-C-13924,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Design Type | SPUR FIRST GEAR |
| Design Type | HELICAL SECOND GEAR |
| Precision Classification | QUALITY NUMBER 10 OR QUALITY NUMBER 9 ALL GEARS |
| Hardness Rating | 43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 0.860 INCHES IN |
| Material Document and Classification | MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | PLAIN SECOND END |
| Hub Nominal Length | 0.130 INCHES SECOND END IN |
| Nominal Outside Diameter | 0.2470 INCHES FIRST GEAR IN |
| Nominal Outside Diameter | 1.1240 INCHES SECOND GEAR IN |
| Surface Treatment | OXIDE OVERALL |
| Material | STEEL COMP 4140 OVERALL |
| Construction | SOLID |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| E4594M2 PRIMARY | Ge Aviation Systems Llc Dba Ge Aviation Div Customer Services Whippany (USA) |
| Reference | Meaning |
|---|---|
| E4594M2 | 5/9 Secondary reference U.S. Government activity |
NSN 3020-00-956-9945 is a Gear Cluster, manufactured by Ge Aviation Systems Llc Dba Ge Aviation Div Customer Services Whippany, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-956-9945 has 1 manufacturer part number on file: E4594M2 (Ge Aviation Systems Llc Dba Ge Aviation Div Customer Services Whippany).
Key specifications for E4594M2: Hub Nominal Diameter: 0.125 INCHES SECOND END IN; Surface Treatment Document and Classification: MIL-C-13924,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Design Type: SPUR FIRST GEAR; Design Type: HELICAL SECOND GEAR. 15 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 3020-00-956-9945 has DEMIL Code Q. 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.