The Gear,helical, cataloged under National Stock Number 3020-00-907-9758, 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 Ge Aviation Systems Llc. Government technical data includes 30 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 | 3020-00-907-9758 |
| Primary Part Number | 141239-01 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Ge Aviation Systems Llc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.125 INCHES BOTH ENDS IN |
| Helix Angle | 3.0000 DEGREES |
| Hub Nominal Diameter | 0.250 INCHES SECOND END IN |
| Teeth Quantity | 72 |
| Surface Treatment Document and Classification | MIL-STD-171 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.017 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.368 INCHES FIRST END IN |
| First Step Nominal Length | 0.060 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 9 |
| Teeth Type | SINGLE HELIX |
| Nominal Overall Length | 0.446 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE HUB |
| Pitch Diameter | 1.0014 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 0.380 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| End Nominal Length | 0.308 INCHES FIRST END IN |
| Nominal Outside Diameter | 1.028 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| End Nominal Diameter | 0.250 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | PLASTIC ACETAL BODY |
| Material | STEEL COMP 303SE HUB |
| Attachment Method | CLAMP |
| Face Nominal Width | 0.061 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 141239-01 PRIMARY | Ge Aviation Systems Llc (USA) |
NSN 3020-00-907-9758 is a Gear,helical, manufactured by Ge Aviation Systems Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-907-9758 has 1 manufacturer part number on file: 141239-01 (Ge Aviation Systems Llc).
Key specifications for 141239-01: Bore Nominal Diameter: 0.125 INCHES BOTH ENDS IN; Helix Angle: 3.0000 DEGREES; Hub Nominal Diameter: 0.250 INCHES SECOND END IN; Teeth Quantity: 72. 30 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.
NSN 3020-00-907-9758 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.