The Gear,helical, cataloged under National Stock Number 3020-01-148-8846, 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 19 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-148-8846 |
| Primary Part Number | 5740139 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Am General Llc |
| Status | ACTIVE |
| Bore Nominal Diameter | 25.1 MILLIMETERS BOTH ENDS MM |
| Helix Angle | 25.2644 DEGREES |
| Teeth Quantity | 52 |
| Body Style | WEBBED, OFFSET, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 1 PLAIN AND 3 PLAIN AXIALLY THROUGH BODY FIRST END |
| Mounting Hole Nominal Diameter | 7.5 MILLIMETERS AND 8.8 MILLIMETERS AXIALLY THROUGH BODY FIRST END MM |
| Teeth Type | SINGLE HELIX |
| Style Designator | FLUSH HUB |
| Pitch Diameter | 146.1 MILLIMETERS NOMINAL MM |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 151.9 MILLIMETERS MM |
| Pressure Angle | 20.0000 DEGREES |
| Material | IRON MALLEABLE OVERALL |
| Bolt Hole Circle Nominal Diameter | 45.0 MILLIMETERS AXIALLY THROUGH BODY FIRST END MM |
| Attachment Method | MOUNTING HOLE AND SLOT |
| Body Recess Nominal Depth | 4.5 MILLIMETERS SECOND END MM |
| Face Nominal Width | 14.9 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 |
| Part Number | Manufacturer |
|---|---|
| 5740139 PRIMARY | Am General Llc (USA) |
| Reference | Meaning |
|---|---|
| 14022652 | 5/9 Secondary reference General Motors Llc Dba General Motors Llc |
| 3020PL0874697 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 14022652 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 2030011488846 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 3020011488846 | 5/9 Secondary reference E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 3020-01-148-8846 is a Gear,helical, manufactured by Am General Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-148-8846 has 1 manufacturer part number on file: 5740139 (Am General Llc).
Key specifications for 5740139: Bore Nominal Diameter: 25.1 MILLIMETERS BOTH ENDS MM; Helix Angle: 25.2644 DEGREES; Teeth Quantity: 52; Body Style: WEBBED, OFFSET, SOLID. 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.