The Gear,bevel, cataloged under National Stock Number 3020-00-910-0644, 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 Electric Company. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-910-0644 |
| Primary Part Number | 639E874P1 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.2400 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.5700 INCHES SECOND END IN |
| Hub Nominal Diameter | 1.5740 INCHES FIRST END IN |
| Teeth Quantity | 23 |
| Body Style | PLAIN, WITH LIGHTENING HOLES |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.8310 INCHES FIRST END IN |
| Nominal Overall Length | 3.4400 INCHES IN |
| Style Designator | PERIPHERAL FACE, PROTRUDING HUBS |
| Pitch Diameter | 3.6000 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN SECOND END |
| Hub Style Designator | 1 GROOVE FIRST END |
| Nominal Outside Diameter | 4.6230 INCHES IN |
| Nominal Distance From End to First Groove | 0.4300 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY OVERALL |
| First Groove Nominal Diameter | 1.4700 INCHES FIRST END IN |
| First Groove Nominal Width | 0.0900 INCHES FIRST END IN |
| Face Nominal Width | 0.8700 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 |
|---|---|
| 639E874P1 PRIMARY | General Electric Company (USA) |
| Reference | Meaning |
|---|---|
| 639E874P1 | 5/9 Secondary reference General Electric Company |
| 639EA874P2 | 5/9 Secondary reference General Electric Company |
NSN 3020-00-910-0644 is a Gear,bevel, manufactured by General Electric Company, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-910-0644 has 1 manufacturer part number on file: 639E874P1 (General Electric Company).
Key specifications for 639E874P1: Bore Nominal Diameter: 1.2400 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.5700 INCHES SECOND END IN; Hub Nominal Diameter: 1.5740 INCHES FIRST END IN; Teeth Quantity: 23. 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.