The Gear,helical, cataloged under National Stock Number 3020-01-417-2710, 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21 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-417-2710 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 49.5 MILLIMETERS FIRST END MM |
| Bore Nominal Diameter | 52.4 MILLIMETERS SECOND END MM |
| Helix Angle | 21.0831 DEGREES |
| Hub Nominal Diameter | 64.0 MILLIMETERS BOTH ENDS MM |
| Teeth Quantity | 68 |
| Body Style | WEBBED, OFFSET, WITH LIGHTENING HOLES |
| Tooth Direction | LEFT |
| Bore Style | PLAIN SECOND END |
| Bore Style | INVOLUTE SPLINE FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 23.6 MILLIMETERS FIRST END MM |
| Nominal Distance Between Body Face and Protruding Hub End | 5.9 MILLIMETERS SECOND END MM |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM TEETH |
| Style Designator | CONE SHAPE BODY, PROTRUDING HUBS |
| Pitch Diameter | 185.6 MILLIMETERS NOMINAL MM |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 39 FIRST END |
| Nominal Outside Diameter | 191.5 MILLIMETERS MM |
| Pressure Angle | 20.0000 DEGREES |
| Spline Pitch Diameter | 49.5 MILLIMETERS NOMINAL FIRST END MM |
| Face Nominal Width | 17.5 MILLIMETERS MM |
| 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 |
|---|---|
| 2783089 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-417-2710 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-417-2710: Bore Nominal Diameter: 49.5 MILLIMETERS FIRST END MM; Bore Nominal Diameter: 52.4 MILLIMETERS SECOND END MM; Helix Angle: 21.0831 DEGREES; Hub Nominal Diameter: 64.0 MILLIMETERS BOTH ENDS MM. 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.
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.