The Gear Cluster, cataloged under National Stock Number 3020-00-012-0097, 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. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-012-0097 |
| Primary Part Number | 142638-01 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Ge Aviation Systems Llc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.126 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.240 INCHES FIRST END IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Precision Classification | QUALITY NUMBER 10 ALL GEARS |
| Nominal Overall Length | 0.280 INCHES IN |
| Hub Style Designator | PLAIN FIRST END |
| Hub Nominal Length | 0.0290 INCHES FIRST END IN |
| Nominal Outside Diameter | 0.3048 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 0.5832 INCHES FIRST GEAR IN |
| Material | COPPER ALLOY 642 SECOND GEAR |
| Material | PLASTIC ACETAL FIRST GEAR |
| Construction | SOLID |
| 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 |
|---|---|
| 142638-01 PRIMARY | Ge Aviation Systems Llc (USA) |
| 142638 | Kurt Manufacturing Company, Inc. Div Kurt Manufacturing Company (USA) |
| Reference | Meaning |
|---|---|
| 142638 | 5/9 Secondary reference Kurt Mfg Co Inc Machining Div |
| 142638 | 5/9 Secondary reference Kurt Mfg Co Inc Kurt Gear Div |
NSN 3020-00-012-0097 is a Gear Cluster, manufactured by Ge Aviation Systems Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-012-0097 has 2 manufacturer part numbers on file: 142638-01 (Ge Aviation Systems Llc), 142638 (Kurt Manufacturing Company, Inc. Div Kurt Manufacturing Company).
3 possible matches (shared part number, not a government interchangeability claim): 5340-00-800-2742, 6750-01-427-1321, 6240-01-461-2135. Verify interchangeability with system specifications before substitution.
Key specifications for 142638-01: Bore Nominal Diameter: 0.126 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.240 INCHES FIRST END IN; Design Type: SPUR SECOND GEAR; Design Type: SPUR FIRST GEAR. 14 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.