The Gear Cluster, cataloged under National Stock Number 3020-01-128-9274, 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 Moog Military Aircraft Llc. Government technical data includes 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-128-9274 |
| Primary Part Number | 2040888-1 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Moog Military Aircraft Llc |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.250 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.310 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | HELICAL FIRST GEAR |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 2.967 INCHES IN |
| Material Document and Classification | MIL-S-5000,COMP 4340 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | 1 STEP BOTH ENDS |
| Hub Nominal Length | 0.360 INCHES SECOND END IN |
| Hub Nominal Length | 0.259 INCHES FIRST END IN |
| Hub Nominal Length | 1.848 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 0.5556 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 0.5874 INCHES FIRST GEAR IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 4340 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 |
|---|---|
| 2040888-1 PRIMARY | Moog Military Aircraft Llc (USA) |
| Reference | Meaning |
|---|---|
| 2040888 | D/9 Drawing number reference only Honeywell International Inc. Div Aerospace - Torrance |
| 2040888-1 | 5/9 Secondary reference Honeywell International Inc. Div Aerospace - Torrance |
| 10106688 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 3020-01-128-9274 is a Gear Cluster, manufactured by Moog Military Aircraft Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-128-9274 has 1 manufacturer part number on file: 2040888-1 (Moog Military Aircraft Llc).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-129-1882. Verify interchangeability with system specifications before substitution.
Key specifications for 2040888-1: Hub Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.310 INCHES BETWEEN FIRST AND SECOND GEAR IN; Design Type: SPUR SECOND GEAR; Design Type: HELICAL FIRST GEAR. 17 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 3020-01-128-9274 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.