The Gear,helical, cataloged under National Stock Number 3020-00-554-7259, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-554-7259 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.3750 INCHES BOTH ENDS IN |
| Helix Angle | 45.0000 DEGREES |
| Hub Nominal Diameter | 0.625 INCHES FIRST END IN |
| Teeth Quantity | 35 |
| Body Style | WEBBED, OFFSET, SOLID |
| Nominal Distance Between Body Face and Protruding Hub End | 0.312 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Nominal Overall Length | 0.625 INCHES IN |
| Style Designator | PROTRUDING HUB, RECESSED BODY |
| Pitch Diameter | 1.4580 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 1.5170 INCHES IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Bolt Hole Circle Nominal Diameter | 0.093 INCHES AXIALLY THROUGH HUB FIRST END IN |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.312 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 |
| Reference | Meaning |
|---|---|
| SMB314768 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-554-7259 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-554-7259: Bore Nominal Diameter: 0.3750 INCHES BOTH ENDS IN; Helix Angle: 45.0000 DEGREES; Hub Nominal Diameter: 0.625 INCHES FIRST END IN; Teeth Quantity: 35. 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.