The Gear Cluster, cataloged under National Stock Number 3020-01-286-7656, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-286-7656 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.256 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.490 INCHES FIRST END IN |
| Hub Nominal Diameter | 0.490 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.380 INCHES BETWEEN FIRST AND SECOND GEAR 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 |
| Counterbore Nominal Diameter | 0.268 INCHES SECOND END IN |
| Design Type | SPUR ALL GEARS |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Precision Classification | QUALITY NUMBER 10 ALL GEARS |
| Nominal Overall Length | 2.374 INCHES IN |
| Material Document and Classification | MIL-S-5000,COND N MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Material Document and Classification | MIL-S-5000,COND N MIL SPEC SINGLE MATERIAL RESPONSE OVERALLUNABLE TO DECODE |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | 1 STEP SECOND END |
| Hub Nominal Length | 0.344 INCHES FIRST END IN |
| Hub Nominal Length | 0.333 INCHES SECOND END IN |
| Hub Nominal Length | 1.317 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 0.750 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 1.583 INCHES FIRST GEAR IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Surface Treatment | PHOSPHATE OVERALLUNABLE TO DECODE |
| Material | STEEL COMP 4340 OVERALL |
| Material | STEEL COMP 4340 OVERALLUNABLE TO DECODE |
| Counterbore Nominal Depth | 2.030 INCHES SECOND END IN |
| Construction | ASSEMBLED |
| Attachment Method | MOUNTING HOLE |
| 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 |
|---|---|
| A1022A136 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-286-7656 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-286-7656: Bore Nominal Diameter: 0.256 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.490 INCHES FIRST END IN; Hub Nominal Diameter: 0.490 INCHES SECOND END IN; Hub Nominal Diameter: 0.380 INCHES BETWEEN FIRST AND SECOND GEAR IN. 28 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 3020-01-286-7656 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.