The Gear Cluster, cataloged under National Stock Number 3020-00-790-3545, 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 Honeywell International Inc. Div Aerospace - Torrance. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-790-3545 |
| Primary Part Number | 49900-1 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.185 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.185 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Nominal Overall Length | 2.125 INCHES IN |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | PLAIN BOTH ENDS |
| Hub Nominal Length | 0.0468 INCHES FIRST END IN |
| Hub Nominal Length | 0.0468 INCHES SECOND END IN |
| Hub Nominal Length | 1.656 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 0.3704 INCHES FIRST GEAR IN |
| Nominal Outside Diameter | 0.3704 INCHES SECOND GEAR IN |
| Surface Treatment | PAINT OVERALL |
| Material | STEEL 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 |
NSN 3020-00-790-3545 is a Gear Cluster, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-790-3545 has 2 manufacturer part numbers on file: 49900-1 (Honeywell International Inc. Div Aerospace - Torrance), 9022186 (Us Army Aviation and Missile Command).
2 possible matches (shared part number, not a government interchangeability claim): 4320-01-378-8449, 2990-01-656-9548. Verify interchangeability with system specifications before substitution.
Key specifications for 49900-1: Hub Nominal Diameter: 0.185 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.185 INCHES BETWEEN FIRST AND SECOND GEAR IN; Design Type: SPUR SECOND GEAR; Design Type: SPUR 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.
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.