The Gear,helical, cataloged under National Stock Number 3020-01-031-0402, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-031-0402 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.064 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.313 INCHES BOTH ENDS IN |
| Helix Angle | 40.0000 DEGREES |
| Hub Nominal Diameter | 0.500 INCHES BETWEEN BODY AND FLANGE IN |
| Teeth Quantity | 8 |
| Body Style | PLAIN, SOLID |
| Flange Nominal Thickness | 0.060 INCHES IN |
| Flange Nominal Diameter | 0.650 INCHES IN |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 44.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | FLANGED END |
| Material Document and Classification | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.7343 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Distance Between Outer Body Face and Inner Flange Face | 0.565 INCHES IN |
| Nominal Outside Diameter | 0.7969 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.190 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.250 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 |
|---|---|
| E-5586 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-031-0402 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-031-0402: Keyway Nominal Width: 0.064 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.313 INCHES BOTH ENDS IN; Helix Angle: 40.0000 DEGREES; Hub Nominal Diameter: 0.500 INCHES BETWEEN BODY AND FLANGE IN. 21 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.