The Gear Cluster, cataloged under National Stock Number 3020-00-151-7581, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-151-7581 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Nominal Diameter | 1.320 INCHES SECOND END IN |
| Hub Nominal Diameter | 1.567 INCHES FIRST END IN |
| Hub Nominal Diameter | 2.500 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Surface Treatment Document and Classification | AMS 2485 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Precision Classification | QUALITY NUMBER 10 OR QUALITY NUMBER 11 ALL GEARS |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM HUB |
| Nominal Overall Length | 4.520 INCHES IN |
| Material Document and Classification | AMS 6265 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | 1 STEP BOTH ENDS |
| Hub Nominal Length | 0.314 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Length | 0.771 INCHES SECOND END IN |
| Hub Nominal Length | 2.185 INCHES FIRST END IN |
| Nominal Outside Diameter | 4.082 INCHES FIRST GEAR IN |
| Nominal Outside Diameter | 6.599 INCHES SECOND GEAR IN |
| Surface Treatment | OXIDE OVERALL |
| Material | STEEL COMP E9310 OVERALL |
| Construction | SOLID |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 5019T31P01 | 5/2 Secondary reference U.S. Government activity |
| 5017T31G01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-151-7581 is a Gear Cluster, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-151-7581: Hub Nominal Diameter: 1.320 INCHES SECOND END IN; Hub Nominal Diameter: 1.567 INCHES FIRST END IN; Hub Nominal Diameter: 2.500 INCHES BETWEEN FIRST AND SECOND GEAR IN; Surface Treatment Document and Classification: AMS 2485 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 21 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 3020-00-151-7581 has DEMIL Code B. 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.