The Gear,helical, cataloged under National Stock Number 3020-01-238-8801, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 30 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-01-238-8801 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Nominal Distance From End to Second Groove | 1.814 INCHES FIRST END IN |
| Bore Nominal Diameter | 1.083 INCHES BOTH ENDS IN |
| Helix Angle | 36.8667 DEGREES |
| Hub Nominal Diameter | 1.250 INCHES FIRST END IN |
| Hub Nominal Diameter | 2.185 INCHES SECOND END IN |
| Teeth Quantity | 40 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 1.999 INCHES COUNTER BORE SECOND END IN |
| Tooth Direction | LEFT |
| Bore Style | W/COUNTERBORE SECOND END |
| Mounting Hole Type and Quantity | 2 PLAIN AXIALLY THROUGH BODY FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.469 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 1.938 INCHES FIRST END IN |
| Mounting Hole Nominal Diameter | 0.125 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 2.4998 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Second Groove Nominal Width | 0.062 INCHES FIRST END IN |
| Hub Style Designator | 1 GROOVE SECOND END |
| Hub Style Designator | 2 GROOVES FIRST END |
| Nominal Outside Diameter | 2.585 INCHES IN |
| Nominal Distance From End to First Groove | 0.407 INCHES SECOND END IN |
| Nominal Distance From End to First Groove | 0.474 INCHES FIRST END IN |
| Second Groove Nominal Diameter | 1.210 INCHES FIRST END IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL COMP 8620 OVERALL |
| First Groove Nominal Diameter | 1.195 INCHES FIRST END IN |
| First Groove Nominal Diameter | 2.145 INCHES SECOND END IN |
| Bolt Hole Circle Nominal Diameter | 1.875 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| DP-862 | C/1 Advisory reference — outside the item-of-supply concept Phillips Corporation Div Federal Division |
| DP-862 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-238-8801 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-238-8801: Nominal Distance From End to Second Groove: 1.814 INCHES FIRST END IN; Bore Nominal Diameter: 1.083 INCHES BOTH ENDS IN; Helix Angle: 36.8667 DEGREES; Hub Nominal Diameter: 1.250 INCHES FIRST END IN. 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.
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.