The Gear Cluster, cataloged under National Stock Number 3020-00-305-1963, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-305-1963 |
| Primary Part Number | 1247159REVA1 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.188 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.235 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Backlash Designation | GRADE B ALL GEARS |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 1,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Precision Classification | ULTRA PRECISION CLASS 1 ALL GEARS |
| Nominal Overall Length | 0.547 INCHES IN |
| Material Document and Classification | QQ-A-225/8,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Nominal Length | 0.500 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 0.7917 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 2.542 INCHES FIRST GEAR IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 6061 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 |
|---|---|
| 1247159REVA1 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 1247159 | D/9 Drawing number reference only Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 3020-00-305-1963 is a Gear Cluster, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-305-1963 has 1 manufacturer part number on file: 1247159REVA1 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 1247159REVA1: Bore Nominal Diameter: 0.188 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.235 INCHES BETWEEN FIRST AND SECOND GEAR IN; Backlash Designation: GRADE B ALL GEARS; Surface Treatment Document and Classification: MIL-A-8625,TYPE 1,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.
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.