The Gear,helical, cataloged under National Stock Number 3020-00-424-7910, 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19 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-424-7910 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.127 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.751 INCHES BOTH ENDS IN |
| Helix Angle | 39.4500 DEGREES |
| Hub Nominal Diameter | 1.250 INCHES FIRST END IN |
| Teeth Quantity | 27 |
| Body Style | WEBBED, OFFSET, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Style Designator | FLUSH HUB |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Pitch Diameter | 3.5117 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 3.710 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.440 INCHES BOTH ENDS IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OVERALL |
| Face Nominal Width | 0.750 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 |
|---|---|
| 51773DA | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
| 51773DA | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-424-7910 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-424-7910: Keyway Nominal Width: 0.127 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.751 INCHES BOTH ENDS IN; Helix Angle: 39.4500 DEGREES; Hub Nominal Diameter: 1.250 INCHES FIRST 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.