The Gear Cluster, cataloged under National Stock Number 3020-01-286-7657, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 23 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-286-7657 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.505 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.725 INCHES FIRST END IN |
| Hub Nominal Diameter | 0.640 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.945 INCHES BOTH ENDS IN |
| Backlash Designation | GRADE C ALL GEARS |
| Surface Treatment Document and Classification | MIL-P-16232,TYPE M,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Design Type | SPUR ALL GEARS |
| Bore Style | PLAIN BOTH ENDS |
| Precision Classification | QUALITY NUMBER 10 ALL GEARS |
| Nominal Overall Length | 1.390 INCHES IN |
| Material Document and Classification | MIL-S-5000,COND N MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Hub Style Designator | 2 STEPS BETWEEN FIRST AND SECOND GEAR |
| Hub Nominal Length | 0.062 INCHES SECOND END IN |
| Hub Nominal Length | 0.354 INCHES FIRST END IN |
| Hub Nominal Length | 0.632 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 0.812 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 1.770 INCHES FIRST GEAR IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Surface Treatment | PHOSPHATE OVERALLUNABLE TO DECODE |
| Material | STEEL COMP 4340 OVERALL |
| Construction | SOLID |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| A1022A143 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-286-7657 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-286-7657: Bore Nominal Diameter: 0.505 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.725 INCHES FIRST END IN; Hub Nominal Diameter: 0.640 INCHES SECOND END IN; Hub Nominal Diameter: 0.945 INCHES BOTH ENDS IN. 23 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.
NSN 3020-01-286-7657 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.