The Gear,helical, cataloged under National Stock Number 3020-00-028-2670, 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 General Motors Corp. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-028-2670 |
| Primary Part Number | 591395 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | General Motors Corp |
| Status | ACTIVE |
| Helix Angle | 120.0000 DEGREES |
| Hub Nominal Diameter | 2.461 INCHES BOTH ENDS IN |
| Teeth Quantity | 23 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | SERRATED BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.248 INCHES FIRST END IN |
| Serration Pitch Diameter | 1.9580 INCHES NOMINAL BOTH ENDS IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 3.3420 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 3.795 INCHES IN |
| Serration Quantity | 4 BOTH ENDS |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.764 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 |
|---|---|
| 591395 PRIMARY | General Motors Corp (USA) |
| 591395 | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| 591395 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| K345-5 | 5/9 Secondary reference Republic Gear Co |
NSN 3020-00-028-2670 is a Gear,helical, manufactured by General Motors Corp, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-028-2670 has 2 manufacturer part numbers on file: 591395 (General Motors Corp), 591395 (General Motors Llc Dba General Motors Llc).
Key specifications for 591395: Helix Angle: 120.0000 DEGREES; Hub Nominal Diameter: 2.461 INCHES BOTH ENDS IN; Teeth Quantity: 23; Body Style: PLAIN, SOLID. 18 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.