The Gear,helical, cataloged under National Stock Number 3020-01-286-7659, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-01-286-7659 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.062 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.275 INCHES BOTH ENDS IN |
| Helix Angle | 1.8164 DEGREES |
| Hub Nominal Diameter | 0.460 INCHES SECOND END IN |
| Teeth Quantity | 61 |
| Body Style | PLAIN, WITH LIGHTENING HOLES |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.164 INCHES SECOND END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | AMS6415 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.0268 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN SECOND END |
| Nominal Outside Diameter | 1.056 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.205 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4340 OVERALL |
| Face Nominal Width | 0.250 INCHES IN |
| 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 |
|---|---|
| SM-C-773956 | D/9 Drawing number reference only U.S. Government activity |
| SM-C-773956-2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-286-7659 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-286-7659: Keyway Nominal Width: 0.062 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.275 INCHES BOTH ENDS IN; Helix Angle: 1.8164 DEGREES; Hub Nominal Diameter: 0.460 INCHES SECOND END IN. 19 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.