The Gear Cluster, cataloged under National Stock Number 3020-01-121-6430, 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 Aimtron 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-121-6430 |
| Primary Part Number | 504611 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Aimtron Systems, Llc |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.625 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Diameter | 0.437 INCHES BOTH ENDS IN |
| Design Type | SPUR ALL GEARS |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 1.875 INCHES IN |
| Material Document and Classification | 66AISI/SAE4340 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | 1 STEP BOTH ENDS |
| Hub Nominal Length | 0.406 INCHES SECOND END IN |
| Hub Nominal Length | 0.156 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Length | 0.658 INCHES FIRST END IN |
| Nominal Outside Diameter | 0.875 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 3.208 INCHES FIRST GEAR IN |
| Material | STEEL COMP 4340 OVERALL |
| 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 |
|---|---|
| 504611 PRIMARY | Aimtron Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| 504611 | 5/9 Secondary reference Cardion Inc |
NSN 3020-01-121-6430 is a Gear Cluster, manufactured by Aimtron Systems, Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-121-6430 has 1 manufacturer part number on file: 504611 (Aimtron Systems, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-159-4798. Verify interchangeability with system specifications before substitution.
Key specifications for 504611: Hub Nominal Diameter: 0.625 INCHES BETWEEN FIRST AND SECOND GEAR IN; Hub Nominal Diameter: 0.437 INCHES BOTH ENDS IN; Design Type: SPUR ALL GEARS; Hardness Rating: 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL. 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.
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.