The Gear,helical, cataloged under National Stock Number 3020-01-340-4810, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Cincinnati Gearing Systems Inc. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-340-4810 |
| Primary Part Number | 15-3000-03331 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Cincinnati Gearing Systems Inc |
| Status | ACTIVE |
| Helix Angle | 15.0000 DEGREES |
| Hub Nominal Diameter | 2.500 INCHES FIRST END IN |
| Hub Nominal Diameter | 3.002 INCHES SECOND END IN |
| Teeth Quantity | 157 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | LEFT |
| Nominal Distance Between Body Face and Protruding Hub End | 1.555 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 9.980 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 20.3173 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Nominal Outside Diameter | 20.580 INCHES IN |
| Pressure Angle | 17.50000 DEGREES |
| Material | STEEL COMP 304 OVERALL |
| Face Nominal Width | 2.000 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 |
| Part Number | Manufacturer |
|---|---|
| 15-3000-03331 | Cincinnati Gearing Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 15-0500-03225 ITEM 338 | 5/9 Secondary reference The Cincinnati Gear Company Dba Power Transmission Systems |
| 15-3000-03331 | 3/9 Design control — primary reference The Cincinnati Gear Company Dba Power Transmission Systems |
NSN 3020-01-340-4810 is a Gear,helical, manufactured by Cincinnati Gearing Systems Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-340-4810 has 1 manufacturer part number on file: 15-3000-03331 (Cincinnati Gearing Systems Inc).
Key specifications for 15-3000-03331: Helix Angle: 15.0000 DEGREES; Hub Nominal Diameter: 2.500 INCHES FIRST END IN; Hub Nominal Diameter: 3.002 INCHES SECOND END IN; Teeth Quantity: 157. 17 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.