The Gear Cluster, cataloged under National Stock Number 3020-01-089-7345, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-089-7345 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.156 INCHES BOTH ENDS0.156 INCHES BOTH ENDS IN |
| Design Type | SPUR SECOND GEARSPUR SECOND GEAR |
| Design Type | SPUR FIRST GEARSPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDSPLAIN BOTH ENDS |
| Nominal Overall Length | 0.222 INCHES0.222 INCHES IN |
| Nominal Outside Diameter | 0.5590 INCHES SECOND GEAR0.5590 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 1.0650 INCHES FIRST GEAR1.0650 INCHES FIRST GEAR IN |
| Surface Treatment | ANODIZE OVERALLANODIZE OVERALL |
| Material | ALUMINUM ALLOY OVERALLALUMINUM ALLOY OVERALL |
| Construction | ASSEMBLEDASSEMBLED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| PR3408-1PC95 | 5/9 Secondary reference The Electric Tachometer Corp. |
| K1421 | 3/9 Design control — primary reference The Electric Tachometer Corp. |
NSN 3020-01-089-7345 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5945-01-170-2267. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-089-7345: Bore Nominal Diameter: 0.156 INCHES BOTH ENDS0.156 INCHES BOTH ENDS IN; Design Type: SPUR SECOND GEARSPUR SECOND GEAR; Design Type: SPUR FIRST GEARSPUR FIRST GEAR; Bore Style: PLAIN BOTH ENDSPLAIN BOTH ENDS. 10 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.