The Gear Cluster, cataloged under National Stock Number 3020-01-285-9139, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-285-9139 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.378 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.260 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Diameter | 1.666 INCHES FIRST END IN |
| Surface Treatment Document and Classification | MIL-P-16232 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Design Type | SPUR ALL GEARS |
| Bore Style | PLAIN BOTH ENDS |
| Precision Classification | QUALITY NUMBER 8 ALL GEARS |
| Nominal Overall Length | 1.062 INCHES IN |
| Material Document and Classification | AMS6260 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | PLAIN FIRST END |
| Hub Nominal Length | 0.500 INCHES FIRST END IN |
| Hub Nominal Length | 0.192 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 1.666 INCHES FIRST GEAR IN |
| Nominal Outside Diameter | 4.642 INCHES SECOND GEAR IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Material | STEEL COMP 9310H 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 |
| Reference | Meaning |
|---|---|
| BMC-005 | 3/9 Design control — primary reference Blanchat Machine Company Inc |
NSN 3020-01-285-9139 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-285-9139: Bore Nominal Diameter: 0.378 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.260 INCHES BETWEEN FIRST AND SECOND GEAR IN; Hub Nominal Diameter: 1.666 INCHES FIRST END IN; Surface Treatment Document and Classification: MIL-P-16232 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 18 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.