The Gear,helical, cataloged under National Stock Number 3020-01-079-3387, 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 Am General Llc. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-079-3387 |
| Primary Part Number | MA129-21014 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Am General Llc |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.223 INCHES COUNTERBORE FIRST END IN |
| Helix Angle | 12.6665 DEGREES |
| Teeth Quantity | 36 |
| Body Style | PLAIN, WITH LIGHTENING HOLES |
| Counterbore Nominal Diameter | 2.750 INCHES COUNTERBORE FIRST END IN |
| Tooth Direction | LEFT |
| Bore Style | W/COUNTERBORE COUNTERBORE FIRST END |
| Teeth Type | SINGLE HELIX |
| Style Designator | HUBLESS |
| Pitch Diameter | 7.3795 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Features Provided | CASEHARDENED |
| Nominal Outside Diameter | 7.7740 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Counterbore Nominal Depth | 0.188 INCHES COUNTERBORE FIRST END IN |
| Face Nominal Width | 3.500 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 |
|---|---|
| MA129-21014 PRIMARY | Am General Llc (USA) |
NSN 3020-01-079-3387 is a Gear,helical, manufactured by Am General Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-079-3387 has 1 manufacturer part number on file: MA129-21014 (Am General Llc).
Key specifications for MA129-21014: Bore Nominal Diameter: 2.223 INCHES COUNTERBORE FIRST END IN; Helix Angle: 12.6665 DEGREES; Teeth Quantity: 36; Body Style: PLAIN, WITH LIGHTENING HOLES. 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.