The Gear,helical, cataloged under National Stock Number 3020-01-116-9499, 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21 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-116-9499 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.378 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 2.313 INCHES BOTH ENDS IN |
| Helix Angle | 20.0000 DEGREES |
| Hub Nominal Diameter | 2.880 INCHES BOTH ENDS IN |
| Teeth Quantity | 66 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | LEFT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.170 INCHES BOTH ENDS IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 1.945 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 7.1269 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 7.3260 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.333 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 1.600 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 |
|---|---|
| 1810-184 | 3/9 Design control — primary reference Terrell Machine Co Inc |
NSN 3020-01-116-9499 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-116-9499: Keyway Nominal Width: 0.378 INCHES BOTH ENDS IN; Bore Nominal Diameter: 2.313 INCHES BOTH ENDS IN; Helix Angle: 20.0000 DEGREES; Hub Nominal Diameter: 2.880 INCHES BOTH ENDS IN. 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.