The Gear Cluster, cataloged under National Stock Number 3020-00-403-5379, 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 Parker Hannifin Corporation Div Chelsea Products Division. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-403-5379 |
| Primary Part Number | 5P394 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Parker Hannifin Corporation Div Chelsea Products Division |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.329 INCHES BOTH ENDS IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Hardness Rating | 59.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 2.600 INCHES IN |
| Material Document and Classification | MIL-S-8690,COMP 8620 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Hub Nominal Length | 0.225 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 2.4290 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 2.8620 INCHES FIRST GEAR IN |
| Material | STEEL COMP 8620 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 |
|---|---|
| 5P394 PRIMARY | Parker Hannifin Corporation Div Chelsea Products Division (USA) |
| Reference | Meaning |
|---|---|
| 10163418 | 7/2 Vendor item drawing reference Us Army Aviation and Missile Command |
NSN 3020-00-403-5379 is a Gear Cluster, manufactured by Parker Hannifin Corporation Div Chelsea Products Division, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-403-5379 has 1 manufacturer part number on file: 5P394 (Parker Hannifin Corporation Div Chelsea Products Division).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-129-7624. Verify interchangeability with system specifications before substitution.
Key specifications for 5P394: Bore Nominal Diameter: 1.329 INCHES BOTH ENDS IN; Design Type: SPUR SECOND GEAR; Design Type: SPUR FIRST GEAR; Bore Style: PLAIN BOTH ENDS. 12 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.