The Gear Cluster, cataloged under National Stock Number 3020-00-600-9470, 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 Systems Llc. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-600-9470 |
| Primary Part Number | GYLC 669 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.156 INCHES BOTH ENDS0.156 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.343 INCHES FIRST END0.343 INCHES FIRST END IN |
| Design Type | SPUR SECOND GEARSPUR SECOND GEAR |
| Design Type | SPUR FIRST GEARSPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDSPLAIN BOTH ENDS |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM TEETH50.0 ROCKWELL C MAXIMUM TEETH |
| Hardness Rating | 47.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM HUB50.0 ROCKWELL C MAXIMUM HUB |
| Material Document and Classification | MIL-S-7947 MIL SPEC SINGLE MATERIAL RESPONSE FIRST GEARMIL-S-7947 MIL SPEC SINGLE MATERIAL RESPONSE FIRST GEAR |
| Material Document and Classification | QQ-S-628 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEARQQ-S-628 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEAR |
| Hub Style Designator | PLAIN FIRST ENDPLAIN FIRST END |
| Hub Nominal Length | 0.016 INCHES FIRST END0.016 INCHES FIRST END IN |
| Nominal Outside Diameter | 0.343 INCHES SECOND GEAR0.343 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 0.6950 INCHES FIRST GEAR0.6950 INCHES FIRST GEAR IN |
| Surface Treatment | OXIDE OVERALLOXIDE OVERALL |
| Material | STEEL ALL GEARSSTEEL ALL GEARS |
| 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 |
|---|---|
| GYLC 669 PRIMARY | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (USA) |
NSN 3020-00-600-9470 is a Gear Cluster, manufactured by Ge Aviation Systems Llc Dba Ge Aviation Systems Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-600-9470 has 1 manufacturer part number on file: GYLC 669 (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc).
Key specifications for GYLC 669: Bore Nominal Diameter: 0.156 INCHES BOTH ENDS0.156 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.343 INCHES FIRST END0.343 INCHES FIRST END IN; Design Type: SPUR SECOND GEARSPUR SECOND GEAR; Design Type: SPUR FIRST GEARSPUR FIRST 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 3020-00-600-9470 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.