The Gear,helical, cataloged under National Stock Number 3020-00-757-4658, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-757-4658 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.091 INCHES BOTH ENDS IN |
| Helix Angle | 3.0000 DEGREES |
| Hub Nominal Diameter | 0.124 INCHES FIRST END IN |
| Hub Nominal Diameter | 0.150 INCHES SECOND END IN |
| Teeth Quantity | 36 |
| Clamping Surface Nominal Length | 0.110 INCHES FIRST END IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE HUB |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.148 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.080 INCHES SECOND END IN |
| Precision Classification | QUALITY NUMBER 10 |
| Teeth Type | SINGLE HELIX |
| Criticality Code Justification | FEAT |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | L-P-392,TYPE 1,CLASS 1 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | MIL-S-7720,COND A MIL SPEC SINGLE MATERIAL RESPONSE HUB |
| Pitch Diameter | 0.5007 INCHES NOMINAL IN |
| Tooth Form | STUB |
| Hub Style Designator | SPLIT FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Nominal Outside Diameter | 0.528 INCHES IN |
| Surface Treatment | PASSIVATE HUB |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 303 HUB |
| Material | PLASTIC ACETAL BODY |
| Face Nominal Width | 0.047 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 139885-01 | 5/9 Secondary reference Ge Aviation Systems Llc |
| 139885-01 | 3/9 Design control — primary reference Ge Aviation Systems Llc Dba Ge Aviation |
NSN 3020-00-757-4658 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-757-4658: Bore Nominal Diameter: 0.091 INCHES BOTH ENDS IN; Helix Angle: 3.0000 DEGREES; Hub Nominal Diameter: 0.124 INCHES FIRST END IN; Hub Nominal Diameter: 0.150 INCHES SECOND END IN. 28 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.