The Gear,helical, cataloged under National Stock Number 3020-00-116-9526, 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 Caterpillar Inc Div Caterpillar Defense. Government technical data includes 25 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 | 3020-00-116-9526 |
| Primary Part Number | 8M7143 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 EXTERNALLY LUBRICATED BEARING |
| Bore Nominal Diameter | 2.000 INCHES BOTH ENDS IN |
| Helix Angle | 8.0000 DEGREES |
| Hub Nominal Diameter | 3.250 INCHES FIRST END IN |
| Hub Nominal Diameter | 3.062 INCHES SECOND END IN |
| Teeth Quantity | 40 |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Tooth Direction | LEFT |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.844 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | ONE PROTRUDING HUB, ONE FLUSH HUB |
| Pitch Diameter | 6.5750 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Features Provided | LUBRICATION GROOVE |
| Hub Style Designator | PLAIN SECOND END |
| Hub Style Designator | 1 GROOVE FIRST END |
| Nominal Outside Diameter | 6.944 INCHES IN |
| Nominal Distance From End to First Groove | 0.188 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL BODY |
| Material | ALUMINUM BORE SURFACE |
| First Groove Nominal Diameter | 2.672 INCHES FIRST END IN |
| First Groove Nominal Width | 0.375 INCHES FIRST END IN |
| Face Nominal Width | 1.000 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 |
|---|---|
| 8M7143 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 3020-00-116-9526 is a Gear,helical, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-116-9526 has 1 manufacturer part number on file: 8M7143 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 8M7143: Furnished Items and Quantity: 1 EXTERNALLY LUBRICATED BEARING; Bore Nominal Diameter: 2.000 INCHES BOTH ENDS IN; Helix Angle: 8.0000 DEGREES; Hub Nominal Diameter: 3.250 INCHES FIRST END IN. 25 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.