The Gear,helical, cataloged under National Stock Number 3020-01-222-4634, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-222-4634 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.750 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 2.896 INCHES BOTH ENDS IN |
| Helix Angle | 30.0000 DEGREES |
| Hub Nominal Diameter | 4.500 INCHES SECOND END IN |
| Hub Nominal Diameter | 4.500 INCHES FIRST END IN |
| Teeth Quantity | 71 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.815 INCHES BOTH ENDS IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 13.6640 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 13.9970 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.752 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL CORROSION RESISTING OVERALL |
| Face Nominal Width | 2.000 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 |
|---|---|
| SSN593-520-1862474 PIECE 4 | 3/2 Design control — primary reference U.S. Government activity |
| SSN593-520-1862474 | D/9 Drawing number reference only U.S. Government activity |
NSN 3020-01-222-4634 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3040-01-222-5488. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-222-4634: Keyway Nominal Width: 0.750 INCHES BOTH ENDS IN; Bore Nominal Diameter: 2.896 INCHES BOTH ENDS IN; Helix Angle: 30.0000 DEGREES; Hub Nominal Diameter: 4.500 INCHES SECOND END IN. 20 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.